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How to re-enable the aboutconfig warning message in firefox 3

How to re-enable the aboutconfig warning message in firefox 3

SEC_ERROR_EXPIRED_CERTIFICATE

MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT

SEC_ERROR_REVOKED_CERTIFICATE

If you’re seeing any of the above security warnings while visiting a website on the Mozilla Firefox browser, this article will guide you through seven ways you can still use the site despite receiving any of these error messages.

However, there are some things you should know before applying these tricks:

  • This article is intended for website visitors. If you’re a website owner, please click on the particular error message above you are seeing for your website and follow the different set of steps mentioned in those articles.
  • As a website visitor, you can’t solve the error, but you can force your browser/operating system to ignore it.
  • Follow these solutions only when you are absolutely certain that the website, you’re visiting is safe.

Before we begin, make sure the date and time on your device are accurate. For computer users, you can see this information displayed on the right side of your task bar at the bottom of your screen. Incorrect date/time settings can cause a variety of errors. If it’s not set properly, right-click on the date/time and select Adjust time/date. Set the right time and date there.

Fix the “Secure Connection Failed” Error in Mozilla Firefox

These tricks will help you to get rid of the “SEC_ERROR_EXPIRED_CERTIFICATE,” “MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT,” and “SEC_ERROR_REVOKED_CERTIFICATE” errors in Firefox.

You don’t necessarily need to perform all of these tricks. Just keep applying them one by one until the error message no longer displays.

1. Continue With an Insecure Connection

Some errors will allow you to accept the risk and continue. You can continue with the insecure connection at your own risk:

  • Click on Advanced.
  • Click on Accept the Risk and Continue.

Note: This trick will not work for the “SEC_ERROR_REVOKED_CERTIFICATE” and other sort of serious errors. If you don’t see this option, move on to the next solution.

How to re-enable the aboutconfig warning message in firefox 3

2. Add the Site to Your List of Trusted Sites

  • Search for Internet Options in the Windows search bar.
  • In the pop-up window, click on the Security tab.
  • Select Trusted sites.
  • Click on the Sites button to open a new window.
  • Manually add the URL of the website that is displaying the error message.
  • Click Apply and OK.

How to re-enable the aboutconfig warning message in firefox 3

3. Temporarily Disable Your Antivirus and Firewall

Some antivirus and firewall solutions are sensitive to SSL errors. To address this issue, all you need to do is turn off HTTPS scanning. All antiviruses have different SSL scanning under different names. Find the appropriate setting such as “HTTPS Scanning,” “Scan SSL”, “show safe result,” “Do not scan encrypted connections,” etc.,and disable it.

If you don’t see any such options, visit the manufacturer’s help section and try to find SSL- and HTTPS-related settings information there.

4. Clear the SSL State

  • Search for Internet Options in the Windows search bar.

How to re-enable the aboutconfig warning message in firefox 3

  • In the pop-up window, select the Content tab.
  • Click on Clear SSL State to clear your SSL cache.

How to re-enable the aboutconfig warning message in firefox 3

5. Clear Your Browsing History

  • Open Firefox and navigate to Options in the top-right drop-down menu.
  • Go to Privacy and Security from the menu bar on the left side.
  • Click on Clear Data in the Cookies and Site Data section.
  • Select Clear History.
  • Select all the options and click on Clear Now.

How to re-enable the aboutconfig warning message in firefox 3

How to re-enable the aboutconfig warning message in firefox 3

6. Permit Firefox to Trust Root Authorities

Firefox has an optional feature that allows the browser to trust root authorities in the Windows certificate store. To activate this feature, you must enable the setting in your browser.

How to re-enable the aboutconfig warning message in firefox 3

  • Type “about: config” into the Firefox address bar.
  • Press the I accept the risk! button.
  • Search for security.enterprise_roots.enabled.
  • In the security.enterprise_roots.enabled window, look to the right side of the screen. If the value is False, double-click on it. The value will get changed to True.
  • Restart Firefox.
  • If you still see the error message, move to the next solution.

7. Change Your Security Settings

  • Type Command Prompt or CMD into the Windows search bar.
  • Right-click on Command Prompt and select Run as Administrator.

How to re-enable the aboutconfig warning message in firefox 3

Type in these three commands, hitting Enter after each one:

The Configuration Editor (about:config page) lists Firefox settings known as preferences that are read from the prefs.js and user.js files in the Firefox profile and from application defaults. Many of these preferences are advanced settings that are not present in the Options Preferences Settings panel. This article describes how to use the about:config page to view, change, or reset Firefox preference settings, if you need to do so.

Table of Contents

  • 1 Opening about:config
  • 2 Searching for preferences
  • 3 Modifying preferences
  • 4 Resetting or deleting preferences
  • 5 Adding preferences

Type about:config in the address bar and press Enter Return .
A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

How to re-enable the aboutconfig warning message in firefox 3

Click Show All to view all preferences currently set in the profile or use the Search preference name box to filter the list.

If you enter a search term and a preference does not exist, you will have the option to add a new preference (see below).

How to re-enable the aboutconfig warning message in firefox 3

You can double-click on a preference to change its value or you can do the following:

For a boolean (true-false) preference, click the Toggle button.

For a string (text) or a number preference, click the Edit button and enter a new value.

How to re-enable the aboutconfig warning message in firefox 3

Click on the checkmark to save the change.

You can only reset or remove modified preferences, which are listed in bold type. (To reset all preferences, see the article Reset Firefox preferences to troubleshoot and fix problems).

How to re-enable the aboutconfig warning message in firefox 3

To add a new preference, enter its name into the Search preference name box at the top of the about:config page. At the bottom of the search results (if any), there will be the option to create a new preference. To do so, specify the type of value that preference will store:

  • String is any sequence of text
  • Number is an integer
  • Boolean is true or false

Click the Add button to create the new preference and set its value. Boolean preferences are set to true by default; use the Toggle button to change the value. For String or Number preferences, click the Save button. Click the Delete button to discard the new preference.

These fine people helped write this article:

How to re-enable the aboutconfig warning message in firefox 3

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Grow and share your expertise with others. Answer questions and improve our knowledge base.

– Last updated on November 24, 2011 by VG

Almost all Firefox users are aware of the hidden command “about:config” which launches Firefox’s secret configuration page. This configuration page contains 1000s of very useful but very advanced settings which can be tweaked to customize or enhance Firefox functionality and features.

We have posted many about:config tutorials in past which help you in enabling lots of hidden new features and enhance Firefox functionality. You can find many of them in following article:

Recently we received an email from an AskVG reader “Blue Bird” who asked us how to re-enable the warning box which is shown when you provide about:config command in Firefox addressbar.

Actually when you type about:config in Firefox URL bar and press Enter, it shows following confirmation prompt first:

How to re-enable the aboutconfig warning message in firefox 3

It warns you that you are going to enter a very advanced settings page. The warning box contains a checkbox “Show this warning next time” which can be disabled to remove the warning permanently.

Now if you intentionally or accidentally unchecked the checkbox and now you want to re-enable the warning box, you can’t do it because there is no option given in Firefox Options window to re-enable it.

Then what to do? How to enable the confirmation prompt again? Don’t worry! Here is the solution. You can re-enable about:config warning using about:config itself.

Just follow these simple steps to re-enable about:config confirmation prompt:

1. Type about:config in Firefox addressbar and press Enter. Since you disabled the warning box, you’ll directly enter configuration page.

2. Now type aboutconfig in Filter box. It’ll show following boolean value in the list:

general.warnOnAboutConfig

3. The above mentioned boolean value would be set to false.

How to re-enable the aboutconfig warning message in firefox 3

Double-click on it or right-click on it and select Toggle option.

4. That’s it. It’ll re-enable the warning message and you’ll get the confirmation prompt whenever you will try to launch about:config in Firefox.

You are here: Home » Mozilla Firefox » How to Restore About:Config Warning Message (Confirmation Prompt) in Mozilla Firefox?

About the author: Vishal Gupta (also known as VG) has been awarded with Microsoft MVP (Most Valuable Professional) award. He holds Masters degree in Computer Applications (MCA). He has written several tech articles for popular newspapers and magazines and has also appeared in tech shows on various TV channels.

Comments

NOTE: Older comments have been removed to reduce database overhead.

Can’t you just un-check the box that says “show this warning next time”…?

Oh, well now I see “how to re-enable” it opps…

^^ Yeah. This method is to enable it again. 😉

Nice find Vishal.

Off topic: I may be doing a tut for AskVG on how to make a Windows 8 styled splash screen using Visual Basic 2010 for people like Hackerpunk1 who loves to create applications. This inspiration came to me while browsing for Windows 8 templates. As far as I seen. There were no tuts like this. So I am going to share it to the AskVG reader before sending it out to Facebook. I will e-mail you the video in a attachment. If it’s OK, you can E-mail the conformation then I can send it.

I have a compaq laptop with windows7 installed, but when i try to activate it gives error code 0xc004F063. any idea how to resolve it? Actually my main aim is to remove WGA notification.

Thank you for the command to access the file ,, It is a perfect solution to my problem

– Last updated on November 5, 2021 by VG

In Mozilla Firefox 94.0 or later versions, if you have opened multiple tabs in Firefox and you click on “Close” button present in the titlebar or you click on “Quit” or “Exit” option present in Firefox Menu, the browser immediately closes the window without displaying any warning or confirmation prompt. This article will help you in restoring the warning box when you try to close Firefox window with multiple tabs opened.

In previous versions of Firefox, whenever you tried to close Firefox window by using titlebar close button, Exit or Quit option or by pressing Ctrl+Shift+Q or ALT+F4 hotkeys, Firefox used to show following warning box asking for your confirmation before closing the main window with multiple tabs running:

How to re-enable the aboutconfig warning message in firefox 3

It was a very helpful feature as many times a user might click on the Close button accidentally and if Firefox doesn’t ask for confirmation, the user will lose all the running tabs.

Now in newer versions of Firefox, Mozilla team has decided to disable this feature by default. Now if you upgrade to install Firefox 94 or later version, the browser doesn’t show any confirmation box when closing multiple tabs.

In my opinion, it’s a bad decision. Warn on closing multiple tabs is an essential feature. The same feature was also not present in popular Chromium-based browsers such as Google Chrome , Microsoft Edge and Opera but recently these browsers started implementing the feature and now Microsoft Edge and Opera warn users on closing multiple tabs as mentioned here (1) and here (2) .

On the other hand, Firefox team decided to disable this feature which will definitely annoy users.

Fortunately, the functionality is still present in Firefox. The team just disabled the option by default. So interested users can still enable the feature again.

If you also want to bring back the good ol’ warn on close multiple tabs feature in Firefox, following methods will help you:

PS: We are going to use the same old method which we used long time back (2011) in following tutorial:

Surprisingly the same method still works after 10 years in 2021.

Let’s start the tutorial:

METHOD 1: Restore Confirmation Box Using Mozilla Firefox Settings

1. Open Firefox and click on the Hamburger icon present at the right-side end of the toolbar to open the main menu. Now click on Settings menu to open Firefox settings page.

Alternatively, you can direct option this page using about:preferences command in address bar.

2. Now under “General” tab, look for “Tabs” section in right-side pane.

3. You’ll see “Confirm before closing multiple tabs” option.

How to re-enable the aboutconfig warning message in firefox 3

To restore the warning box on closing multiple tabs, enable or check the checkbox for the above mentioned option.

It’ll immediately bring back the confirmation dialog box in Firefox browser.

METHOD 2: Restore Warning Box Using About:Config Page

1. Open Firefox and type about:config in the address bar and press Enter. It’ll show you a warning message, click on “Accept the Risk and Continue” button. It’ll open Firefox’s hidden secret advanced configuration page i.e. about:config page.

2. Now type warnon in Search filter box and look for following preferences in the window:

Some of the preferences values would be set to false by default, which means the confirmation or warning box is disabled in your Firefox browser.

How to re-enable the aboutconfig warning message in firefox 3

3. To enable the confirmation box, double-click on each preference (where the value is set to false) and change their values to true. Alternatively, you can click on the Toggle icon given next to the preference name.

If a preference value if already set to true, don’t change it.

That’s it. It’ll immediately activate and enable the warning box to confirm before closing multiple tabs in Mozilla Firefox.

PS: In future, if you decide to restore default behavior and disable confirmation box in Firefox, set above mentioned preferences/flags to false again.

You are here: Home » Mozilla Firefox » [Tip] Restore Warning or Confirmation Box on Closing Firefox Window

About the author: Vishal Gupta (also known as VG) has been awarded with Microsoft MVP (Most Valuable Professional) award. He holds Masters degree in Computer Applications (MCA). He has written several tech articles for popular newspapers and magazines and has also appeared in tech shows on various TV channels.

Comments

NOTE: Older comments have been removed to reduce database overhead.

You’re right. It would be very annoying to loose all my tabs unexpectedly. I just, 10 minutes ago, updated to FF 94 and read your newsletter. Glad I saw it before I closed the browser. Keep up the good work.

Thank you for this article. Exactly what I was looking for.

More simple than that now

go under tools
go to general and under tabs, select Confirm before closing multiple tabs

Mozilla Firefox is an open-source internet browser created by Mozilla Corporation. Now at version 70.0.1, Mozilla continues its trend of being a full-featured browser that’s packed full of strong security and privacy features. Other exclusive features of Mozilla Firefox include an ad-free browsing mode, track-protected private browsing mode and more.

Mozilla Firefox also provides users with a clean interface and is supported across popular operating systems such as Windows, Mac/iOS and Android, among others. As with most modern browsers, Mozilla also supports JavaScript, which is enabled by default to allow users view interactive elements like display ads and animations on web pages.

In this guide, we will provide you with the basics about JavaScript in Mozilla Firefox as well as how you can activate or disable it in no time. If you don’t have Firefox installed, you can simply download it from the Mozilla Foundation’s website.

Instructions for Web Developers

You may want to consider linking to this site, to educate any script-disabled users on how to enable JavaScript in six most commonly used browsers. You are free to use the code below and modify it according to your needs.

On enablejavascript.io we optimize the script-disabled user experience as much as we can:

  • The instructions for your browser are put at the top of the page
  • All the images are inlined, full-size, for easy perusing

We want your visitors to have JavaScript enabled just as much as you do!

What Is JavaScript and Why Do I Need It?

JavaScript is a browser-based scripting language that is used to add dynamic interactions and functionalities to web pages. Today, modern web browsers like Mozilla Firefox have JavaScript enabled by default, allowing users access to enjoy user-interactive experiences on web pages.

With JavaScript turned off, Firefox users will be unable to view or experience dynamic features on the internet. For example, if you turn off JavaScript in your Firefox browser, you can say goodbye to automated updates on your Facebook and Twitter timeline. Similarly, websites like Amazon and YouTube become almost impossible to use when you turn off JavaScript because it contributes in large part to their interactivity capabilities.

How to Check if JavaScript is Enabled in Firefox

If you want to tell if JavaScript is already enabled in your Firefox browser, then follow this simply procedure to know how.

– Last updated on December 26, 2011 by VG

If you use Mozilla Firefox web browser, you might have noticed that if you open more than one tab and click on Close button, the browser shows a warning message box telling you that you are about to close multiple tabs and asks for your confirmation “Are you sure you want to continue” as shown in following screenshot:

How to re-enable the aboutconfig warning message in firefox 3

If you look carefully, the message box also contains a checkbox “Warn me when I attempt to close multiple tabs“. If you accidentally or intentionally disabled/unchecked the checkbox and clicked on Close tabs button, the browser will not show the warning message next time you try to close multiple tabs and will immediately close the window.

Now the question comes how to restore the “Warn on Close” warning message and confirmation prompt so that you don’t lose your running tabs if you accidentally click on Close button in future?

Here comes the solution! Firefox provides a simple option in its Preferences window to restore this confirmation prompt. You can use following easy steps to restore the warning message in Mozilla Firefox:

UPDATE: New working method for Firefox 94.0 and later versions:

METHOD 1: Using Firefox Options Window

NOTE: In newer Firefox versions, the option mentioned in this method has been removed from Firefox Preferences window. Check out METHOD 2 for newer versions.

1. Click on Firefox Menu button and select Options. Alternatively, you can press ALT key to temporary show Menubar and then select Tools -> Options. Or you can directly launch it using about:preferences URL in address bar.

2. It’ll open Firefox Options window. Now go to “Tabs” tab and enable “Warn me when closing multiple tabs” option:

How to re-enable the aboutconfig warning message in firefox 3

3. That’s it. Click on OK button and it’ll restore the warning message and confirmation prompt in Firefox.

METHOD 2: Using Advanced Configuration Page

If you can’t find the above mentioned option in Firefox Preferences window, you can restore the “Close multiple tabs” warning message using Firefox’s hidden secret advanced configuration “ about:config ” page.

1. Open Mozilla Firefox and type about:config in the addressbar and press Enter. It’ll show you a warning message, click on “I accept the risk!” button.

2. Now type warnonclose in Search filter box and it’ll show following preference in the window:

3. If the preference value is set to true, it means warning on closing multiple tabs is enabled. If the value is set to false, it means the warning message is disabled.

How to re-enable the aboutconfig warning message in firefox 3

To restore the warning or confirmation message, set the browser.tabs.warnOnClose preference to true.

Simple. Isn’t it? Did you also face this problem in past? How did you manage to restore the message box? Please share your experience in your comment…

NOTE: If you are using any other web browser and want to enable or disable “Warn on Close” feature, following tutorial will help you:

You are here: Home » Mozilla Firefox » How to Restore “Close Multiple Tabs” Warning Message (Confirmation Prompt) in Mozilla Firefox?

Published in: Mozilla Firefox

About the author: Vishal Gupta (also known as VG) has been awarded with Microsoft MVP (Most Valuable Professional) award. He holds Masters degree in Computer Applications (MCA). He has written several tech articles for popular newspapers and magazines and has also appeared in tech shows on various TV channels.

Comments

NOTE: Older comments have been removed to reduce database overhead.

Ty you so much, couldn’t find help else where! Clicked it once, and now I want the warning back, since I accidentally click X all the time

There is no firefox orange button on the screen to click.

^^ You need to open Options from Firefox menu.

You can tweak a host of settings in Firefox by using the about:config menu. Here’s how to customize the browser to your liking.

How to re-enable the aboutconfig warning message in firefox 3

Firefox offers a variety of settings you can access through the Options menu, but there is much more you can do with Mozilla’s browser. Firefox offers a built-in Configuration Editor, accessible by typing about:config in the address field, which provides access to hundreds of different features and settings you can enable, disable, or otherwise customize.

But how do you know which configuration settings you can and should touch? Let’s look at how to access the editor and review some specific settings you might want to tweak.

Access about:config Menu

Browse Configurations

You can browse through the lengthy list of configuration settings, but if you’re looking for a particular setting, type it in the search field at the top.

As you look through the Configuration Editor, you’ll notice that different settings have different types of values. Some settings are Boolean, meaning they can be set to either true or false. Some settings have an integer or number as a value, others have a text string as a value.

Change Configuration Settings

Copy, Paste, Create, or Reset Settings

Notice that when you right-click on a setting, the menu offers other commands. You can copy the setting, name, or the value, which might be helpful if you want to copy and paste the information as a backup or use the information to create a new setting. Or create a brand-new setting using a string, integer, or Boolean True/False as the value.

Keep track of any changes you make in the Configuration Editor so you can easily find them again. If a particular change isn’t quite working out for you, just right-click on it and select Reset from the pop-up menu to return to its default value.

Load Bookmarks in a New Tab

Loads Searches in a New Tab

If you’ve added the search bar to your main toolbar in Firefox, notice what happens when you type a search term in that bar. The search results replace your current page. Maybe you’d rather the results open in a new tab so you can continue to use your current page.

In the editor, search for browser.search.openintab. Change the value from false to true. Now type a search term in the search bar and you’ll see that the results appear in a new tab.

Dim the Page When Searching

You can easily search for specific words and terms on a webpage in Firefox. Just press Ctrl+F and type your search term in the field on the bottom search bar. Firefox will highlight the first instance of your term on the page and allow you to browse through each appearance. However, if you want to see all instances by scrolling through the page, you can have that, too.

In the Configuration Editor, search for findbar.modalHighlight. Change the value from false to true. Now, try searching for a word or term on your current page. In addition to highlighting each instance, Firefox dims the rest of the page so that you can more easily spot your search term.

Highlight All Search Words

Here’s another handy option if you’re searching for words on a webpage. When you search for a term on a page, Firefox only highlights the first instance of it. You have to keep pressing Enter or clicking the Down arrow on the bottom Search bar to move to each new instance.

In the editor, search for findbar.highlightAll and change its value from false to true. Now, search for a word on a webpage, and Firefox will highlight every instance of that word.

Disable Backspace Key

Have you ever accidentally hit the Backspace key on your keyboard, which then brings you back to the previous page you were viewing? This can be especially annoying if you’re filling out a form or other page online, and you lose whatever information you entered by going back a page.

In the editor, search for browser.backspace_action. By default, the value is set to 0, which means pressing Backspace sends you back to the previous page. Change the value to 1, and pressing Backspace takes you up the current page one section at a time. Change the value to 2, and pressing Backspace does nothing.

Spell Check All Text Boxes

Firefox’s built-in spell checker alerts if you misspell a word in a form or text box, but it only works with multi-line text fields, such as in a form, not for single-line fields, like a search box.

To change this, make sure spell checking is already enabled. Go to Options > General and check the box to Check your spelling as you type.

In the Configuration Editor, search for layout.spellcheckDefault. Set the value to 2. Now spell checking will chime in for any field or form in which you enter text.

Firefox Functions for Browsing Like a Boss

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I’m using selenium-webdriver with ruby to write automated tests.

Chrome and the chromedriver binary work really well, but I have an issue with Firefox that is related to the configuration of the browser and that’s making my tests fail, whereas they pass with Chrome.

When executing the tests in Firefox, sometimes I get an alert with this message:

Although this page is encrypted, the information you have entered is to be sent over an unencrypted connection and could easily be read by a third party

And it breaks the execution. Is there a way of disabling this warning in recent Firefox versions (10+) or handling this behavior with Selenium?

3 Answers 3

In the process of finding a solution for this, I think I might have found a bug in Capybara (v1.1.2).

I managed to get around this problem using the following approach, instead of using the click from capybara (which would not allow me to capture an exception), I started using the click method from selenium-webdriver.

It seems that when Firefox triggers this alertbox, a string with the message

Although this page is encrypted, the information you have entered is to be sent over an unencrypted connection and could easily be read by a third party

is returned as a result of object.native.click , otherwise the string

Here is what you can do. Type about:config in the firefox. You would be presented a number of options (once you pass through a warning message).

You have to look for security.warn_leaving_secure; and security.warn_leaving_insecure. Make both of them false. And you would be good to go.

Please note: This would work only on the FF instance you have made modification to, so you will need to use firefox profile to launch this instance.

Hope this helps.

Actually this meant to be a comment but I need to go above 50 in order to be able to comment..I suppose by ‘breaking’ the execution you mean that of the Ruby Script right? What happens to Firefox? Needs a click to proceed? If that is the case you can improvise by capturing the Ruby error after inserting the sensitive code (where it breaks) between a BEGIN and a RESCUE clause..Something like this..

– Last updated on March 13, 2017 by VG

In the recently released Mozilla Firefox 52 version, Mozilla has disabled support for NPAPI (Netscape Plugin Application Programming Interface) plugins such as Microsoft Silverlight, Java, Unity, Acrobat, Shockwave, DivX, etc. Only support for Adobe Flash Player plugin is enabled as its still widely used by websites.

Mozilla decided to disable supports for all NPAPI plugins except Adobe Flash as according to the company, these plugins are the main reason behind browser crashes and other performance and security related issues.

The good news is that if some users want to enable support for all NPAPI plugins back in Firefox browser, Mozilla has provided a preference to turn on the support in the meantime.

If you also want to bring back support for all NPAPI plugins in Mozilla Firefox 52 or later versions, this tutorial will help you.

We’ll need to use Firefox advanced configuration tool “ about:config ” to re-enable support for NPAPI plugins as shown in following steps:

1. Open Mozilla Firefox and type about:config in the addressbar and press Enter. It’ll show you a warning message, click on “I accept the risk!” button. It’ll launch Firefox’s hidden advanced configuration page.

2. Now right-click anywhere in the preferences list and select “New -> Boolean” option.

How to re-enable the aboutconfig warning message in firefox 3

3. Type plugin.load_flash_only in the preference name box and click on OK button.

How to re-enable the aboutconfig warning message in firefox 3

4. Now select False in the boolean value box and click on OK button.

How to re-enable the aboutconfig warning message in firefox 3

That’s it. Restart Firefox and now all disabled NPAPI plugins should start working again without any problem.

NOTE: According to Mozilla, this built-in preference to bring back support for NPAPI plugins might be removed completely in future Firefox versions.

You are here: Home » Mozilla Firefox » [Firefox Tip] Enable Support for NPAPI Plugins Such as Silverlight, Java, Acrobat, etc

Published in: Mozilla Firefox

About the author: Vishal Gupta (also known as VG) has been awarded with Microsoft MVP (Most Valuable Professional) award. He holds Masters degree in Computer Applications (MCA). He has written several tech articles for popular newspapers and magazines and has also appeared in tech shows on various TV channels.

Comments

NOTE: Older comments have been removed to reduce database overhead.

Thanks, my silverlight works.

Right clicking anywhere in the preferences list does not bring up a menu that contains a “new” option, the menu that is shown only contains;
COPY
SELECT ALL
SEARCH GOOGLE FOR….
VIEW SELECTION SOURCE
INSPECT ELEMENT

^^ Newer versions of Firefox come with redesigned about:config page. Now the method to create new values has been changed. Copy/paste plugin.load_flash_only in search box given on about:config page and you’ll get an option to create the new value.

Hey, thanks a lot for this article. I did what you recommend (on 12/12/2019) but in the 84 version but I can’t still access to my DVR local address/IP.
Please help & thank you in advance.
Best regards.

Sometimes, you may need to enable or disable JavaScript in Firefox browser manually. Because faulty scripts can harmful for privacy and security, slow down the web page loading, and freezes the web browser. So, read this post to know how to do that in 4 steps.

You may know that JavaScript is a high-level programming/scripting language for the web. It uses to add additional functionalities to the web pages. It helps to make dynamic web pages and special effects on web pages. Apart from it, you can create stunning and interactive web pages with JS, because it allows adding animations and validations. Well, JavaScript is a lightweight and can runs on both server and client side i.e. on the browser.

You may notice the special effects on some of your favorite websites like animated menus and buttons. However, JavaScript enhances your web experience.

How to re-enable the aboutconfig warning message in firefox 3

But, sometimes, the problems occur on web pages because of JS. The web browser may freeze or crashes due to faulty JavaScript on the web page.

So, if you want to view the web page that freezes because of JS, you may need to disable the JavaScript to solve this problem.

Thanks to the web browsers to offers an option to turn on and off JavaScript.

Well, most of the web browsers provide this option in settings. But, not in the case of Mozilla firefox.

Enabling and disabling JavaScript in firefox browser is not a straight forward process. Because you can’t see any option for JS in settings. But, through the advanced configuration settings, you can turn on and off JavaScript easily with one click.

Let’s get started.

Steps to Enable and Disable JavaScript in Firefox

Before proceeding, make sure you have an updated version Mozilla Firefox browser. The steps are given below for enabling and disabling JavaScript in Firefox.

Note: The steps are the same for Firefox for Windows, macOS, Linux, and Android OS.

Step 1. Open the Mozilla Firefox browser and type “about:config” (without quotes) in the address bar and press the Enter button.

How to re-enable the aboutconfig warning message in firefox 3

Step 2. On the next window, you’ll see the warning message on the screen. Because advanced configuration preferences can affect Firefox security and performance. So, click on the “Accept the risk and continue” button to proceed with caution.

Step 3. Now the Advanced Preferences window will be open. You can search the preferences by name using the search feature. Alternatively, click on the Show all button to see the all preferences. Without searching, it is hard to find a preference.

Type “javascript.enabled” (without quotes) in the search field and you’ll see the preference. Also, you’ll see the status and toggle button.

How to re-enable the aboutconfig warning message in firefox 3

Step 4. Click on the toggle button to enable or disable JavaScript.

Now you can open any website without loading JS.

Also check out Edge browser flags to add new features.

However, you can also install an extension from Firefox add-ons. Add and Install Disable JavaScript extension to add the toggle button on the toolbar. The link is given below.

Open the link and click on the Add to Firefox button to download it. After that, click on the Add button to install the extension.

You’ll see the toggle button on the toolbar. Click on the button to turn on and off JS.

The extension also gives some other features like set the default state, add domains manually, disable behavior by domain or tab, provides shortcuts and context menu, and view blacklisted & whitelisted domains list.

This extension also requires to access your data for all websites and access browser tabs.

Why do you need to Enable and Disable JavaScript in Firefox?

JS is enabled by default on all browsers. There are many reasons to toggle on and off it.

  • You want to increase the web page loading speed.
  • A website forces to download the malware using JS.
  • The website shows popup ads using JavaScript.
  • The browser crashed on some web pages because of JS.

So, these are the reasons to disable the JS. However, after disabling, you can’t see some web pages properly because web pages may break. Also, some functionality will be missing. So, you need to re-enable it.

Final Words

Now you know how to enable and disable JavaScript in Firefox. You have two options for this. Either using inbuilt advanced preference settings or using extensions. However, Firefox warns about security before opening the about:config page, but it is safe to use the JS option. On the other hand, extensions need permissions and put privacy and security at risk.

Firefox displays “This Connection is not Secure. Logins entered here could be compromised” warning messages when sites don’t protect their login pages with HTTPS.

The idea behind the feature is to display a visual reminder to Firefox users that the data that they enter into a form is not protected when they hit the login or submit button on websites that don’t use HTTPS.

While that is a handy reminder for many inexperienced Firefox users, experienced users may not find it super handy to have.

The main reason for that is that you can look at the page address, or the lock icon, displayed in the browser’s address bar to see the same thing. If there is a red strike-through lock icon, and if the site is not using https, then anything that you enter on the site and submit is not encrypted and thus readable.

This Connection is not Secure

How to re-enable the aboutconfig warning message in firefox 3

The prompt, as useful as it may be to some users, may cause two issues for other users. First, it prevents that login information is filled out automatically on affected sites.

Firefox’s password manager won’t fill out the information automatically, so that you need to do so manually in some way. This may be the sane thing to do on new sites, but if you are a regular on a site that has not just yet switched to HTTPS, you may trust the site enough to want Firefox to continue filling out the information to improve the login process.

The second issue is not as dramatic, but the prompt may overshadow other page elements. If the username and password prompt are displayed vertically, the username prompt warning may overshadow the password field.

Mozilla notes that you can just hit Enter to dismiss it, but this did not work for me. Whenever I hit the Enter-key, the data was submitted. Clicking outside the box helps however and dismisses the box.

Disabling the contextual warning

How to re-enable the aboutconfig warning message in firefox 3

Here is how you disable the “this connection is not secure” warning in Firefox:

  1. Load about:config in the Firefox address bar and hit the Enter-key.
  2. Search for security.insecure_field_warning.contextual.enabled .
  3. Double-click the preference.

The default value of the preference is true, which means that the feature is enabled and that Firefox will display warning prompts when you activate insecure login fields. If you set it to false, those warnings are not shown.

Toggling the preference won’t have any effect on the automatic filling out of forms on HTTP pages.

How to re-enable the aboutconfig warning message in firefox 3

You need to modify another preference of the Firefox web browser for that.

  1. Open the about:config page again.
  2. Search for signon.autofillForms.http.
  3. Double-click the preference.

The default value of false prevents the Firefox web browser from filling out form information on HTTP pages. If you set it to true, Firefox will auto-fill form pages on HTTP pages as well.

Closing Words

The warnings will become less and less as time passes as more and more sites will migrate to HTTPS. The warnings may raise awareness, and that is definitely a good thing. Statistics on how many users are leaving the login pages of sites where the warning message is displayed would be useful

Now You: Do you find the prompts useful?

How can I allow CORS on Firefox?

I easily managed it on Chrome and Internet Explorer, but I am totally failing at it with Firefox. I edited the following about:config entry

This attempt has been posted several times here and is told on other sites too, but it doesn’t have any effect. I read the Mozilla guide to same-origin policies:

but it just explains CORS and the related topics. A workaround to enable it on Firefox is not listed.

Is there a definitive solution?

PS: FORCECORS does not work either somehow.

How to re-enable the aboutconfig warning message in firefox 3

How to re-enable the aboutconfig warning message in firefox 3

5 Answers 5

Do nothing to the browser. CORS is supported by default on all modern browsers (and since Firefox 3.5).

The server being accessed by JavaScript has to give the site hosting the HTML document in which the JS is running permission via CORS HTTP response headers.

security.fileuri.strict_origin_policy is used to give JS in local HTML documents access to your entire hard disk. Don’t set it to false as it makes you vulnerable to attacks from downloaded HTML documents (including email attachments).

It’s only possible when the server sends this header: Access-Control-Allow-Origin: *

If this is your code then you can set up it like this (PHP):

How to re-enable the aboutconfig warning message in firefox 3

This Firefox add-on may work for you:

It can toggle CORS on and off for development purposes.

I was stucked with this problem for a long time (CORS does not work in FF, but works in Chrome and others). No advice could help. Finally, i found that my local dev subdomain (like sub.example.dev) was not explicitly mentioned in /etc/hosts, thus FF just is not able to find it and shows confusing error message ‘Aborted. ‘ in dev tools panel.

Putting the exact subdomain into my local /etc/hosts fixed the problem. /etc/hosts is just a plain-text file in unix systems, so you can open it under the root user and put your subdomain in front of ‘127.0.0.1’ ip address.

How to re-enable the aboutconfig warning message in firefox 3

Very often you have no option to set up the sending server, so I changed the XMLHttpRequest.open call in my JavaScript code to a local get-file.php file where I have the following code in it:

The JavaScript code is doing this:

In my case this solved the restriction/situation just perfectly. There isn’t any need to hack Firefox or servers. Just load your JavaScript/HTML file with that small PHP file into the server and you’re done.

Firefox 3 comes with several preferences baked into its options dialogs, but there are still a few you can only access by rolling up your sleeves and digging into its configuration manually. Power users have been diving under Firefox’s hood to get their browser to behave just how they like since version 0.9, but Firefox 3 offers some new settings that customize its new features. Let’s take a look at our favorite Firefox 3 about:config tweaks for customizing your browser.

What the heck is about:config ? Firefox keeps its advanced settings in a giant configuration file in your Firefox directory, and even offers an advanced interface to edit that file in the browser itself. To make these changes, type about:config in Firefox’s address bar. You’ll get a half-joking, half-serious message about voiding Firefox’s warranty if you change any settings. Press the “I’ll be careful. I promise!” button (because you will be) and you’ll be on your way. Warning: Keep track of what settings you change where in about:config , because one false move can make your browser go loony. You’d do well to back up your Firefox profile first before proceeding.

Got all that? Onto the tweaks.

Set Firefox 3 to use Gmail as your default mailto: link client. When you come across a clickable email address on web page, you don’t have to copy the address, switch to Gmail, hit Compose on a new message, and paste it into the To: box. Firefox 3 can now register web applications like Gmail to handle certain link types. This trick isn’t exclusively an about:config tweak—it involves some Javascript as well—but in the end you’ll be able to click an email link and automatically launch a new Gmail message. Here’s how to set Firefox 3 to launch Gmail for mailto links .

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How to re-enable the aboutconfig warning message in firefox 3

re-enable confirmation dialog before running applets

  • 7 replies
  • 4 have this problem
  • 581 views
  • Last reply by cor-el

How to re-enable the aboutconfig warning message in firefox 3

I’ve selected “[ ] do not ask again” when prompted to run java applet. Now all applets run without confirmations. How can I restore confirmation dialog for java applets?

Chosen solution

Already done that, didn’t help.

Anyway, was playing with settings, cleared all cache in browser and java and did the following: In java control panel: Security Tab -> Certificates -> Trusted Certificates -> User Tab -> Cleared all. Advanced Tab -> Security -> General -> unchecked “Don’t prompt for client certificate selection when no certificates or only one exists”.

In Firefox, about:config reset property “pref.advanced.javascript.disable_button.advanced” to default. (Now I don’t see that property anymore?)

I don’t really know, which one helped, but now the confirmation dialog appears!

Thank you everyone for help.

All Replies (7)

How to re-enable the aboutconfig warning message in firefox 3

Can you not set that from the Java applet in the Control Panel?

How to re-enable the aboutconfig warning message in firefox 3

No you can’t. That was a second place I’ve looked, it’s a Firefox’s option. Firefox asks that question (when it’s enabled), not java. I was able to restore this dialog few months back, but I can’t find that option now.

UPDATE: It’s java related, not Firefox as I assumed.

Modified September 2, 2012 at 6:41:48 AM PDT by mitis77

Try to clear the Java cache.

How to re-enable the aboutconfig warning message in firefox 3

Thanks for your suggestion, but clearing java cache did not help.

How to re-enable the aboutconfig warning message in firefox 3

try from Control Panel (as finitarry suggest above) > open Java > Java Control Panel > Advanced tab > in Settings > Security > Mixed Code (sandboxed vs. trusted) security verification > check Enable – show warning if needed [ v ]

Modified September 2, 2012 at 6:07:02 AM PDT by ideato

How to re-enable the aboutconfig warning message in firefox 3

Chosen Solution

Already done that, didn’t help.

Anyway, was playing with settings, cleared all cache in browser and java and did the following: In java control panel: Security Tab -> Certificates -> Trusted Certificates -> User Tab -> Cleared all. Advanced Tab -> Security -> General -> unchecked “Don’t prompt for client certificate selection when no certificates or only one exists”.

In Firefox, about:config reset property “pref.advanced.javascript.disable_button.advanced” to default. (Now I don’t see that property anymore?)

I don’t really know, which one helped, but now the confirmation dialog appears!

It looks as though Mozilla allowed a certificate, encryption keys, to expire. This automatically disabled all add-ons because they require authentication. You should see the link on every support.Mozilla.org page at the top: We rolled out a hotfix that re-enables affected add-ons. The fix will be automatically applied in the background within the next few hours. For more details, please check out the update at https://support.mozilla.org/en-US/kb/add-ons-failing-install-firefox You have a choice of 3 different methods to fix this problem: 1. In order to have Mozilla apply the hotfix, under about:preferences#privacy, you must “Allow Firefox to install and run studies.” This is a passive type of update. When you enable permission, you must wait for Firefox to install and run studies.

2. See Below How to Add the Intermediate Certificate Using the Certificate Manager, Authorities Tab, Import Command. You Must Have the Intermediate Certificate in a *.PEM Text File. You May be Required to Re-apply All of Your Add-ons.

3. This Method Does Not Work for the Standard Windows Release: You can either use what Mozilla calls “Studies” to install a hotfix, manually add the Intermediate Certificate, or you can do something more drastic outlined here: https://adblockplus.org/forum/viewtopic.php?f=1&t=65910#p188241

WARNING: The adblockplus.org “fix” in the above thread disables ALL authentication encryption key requirements. USE AT YOUR OWN RISK. If you use the above fix, I suggest you use it temporarily until Mozilla comes out with an upgrade above version 66.0.3. Mozilla is saying to use the Studies method because the above adblockplus method interferes with their hotfix: https://blog.mozilla.org/addons/2019/05/04/update-regarding-add-ons-in-firefox/

I realize you are using an older version of Firefox so it’s your choice what to do.

Modified May 6, 2019 at 1:54:32 AM PDT by Cypherdude

I have configured my version of Firefox to show the windows and tabs that I had opened the last time whenever I open it.

It is the most comfortable option for me, as I can keep sites open in the browser instead of having to save them as bookmarks. Plus, I can continue work without having to open sites again first.

While the browser’s session restore feature is very convenient, some of you may only want to use it at times, but not all the time.

There is no option in Firefox to give you that choice when you close the browser, as Mozilla removed it in Firefox 5.

It is still possible to configure Firefox to warn you on exit, so that you can decide whether to keep the open tabs or start without session restore the next time you open it.

That feature requires some digging in Firefox’s advanced configuration though.

Update:Firefox is configured to automatically warn users when they quit the browser by default if tabs are still open. Firefox users may also enable “Warn you when closing multiple tabs” on the about:preferences page of the browser. End

Show quit message on exit in Firefox

How to re-enable the aboutconfig warning message in firefox 3

The message above is displayed if you have configured Firefox to display a warning when you close the browser. You can use it to save and quit, which would load the open tabs the next time you start the browser, quit, which won’t save the tabs and therefore also do not load them, or cancel to stop the closing.

So how do you get that message in Firefox?

  1. Type about:config in the browser’s address bar and hit the enter key on your keyboard.
  2. Confirm you will be careful if a warning message is displayed to you.
  3. Search for the preference browser.warnOnQuit.
  4. Double-click the preference.

This sets the preference to true, which means that Firefox will display the quit dialog when you close the browser.

Note : The dialog is only displayed if you have configured Firefox to display the home page or a blank page. If you have configured it to display tabs and windows of the last session, it won’t be displayed.

How to re-enable the aboutconfig warning message in firefox 3

You can undo the change at any time by repeating the four steps outlined above. This sets the preference to false and marks it as inactive as a consequence.

Setting the preference to true can be useful if you want to save session information at times, but not all the time. It is also preventing accidental closings of the browser as the prompt is displayed to you whenever you close the Firefox browser.

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How to re-enable the aboutconfig warning message in firefox 3

How do disable the new Fullscreen message?

  • 3 replies
  • 3 have this problem
  • 126 views
  • Last reply by jscher2000 – Support Volunteer

How to re-enable the aboutconfig warning message in firefox 3

My UserChrome.css is edited to block the message when using fullscreen. The new update has a new fullscreen message, and ignores the code written in the UserChrome.css.

I am currently using this code, (its no longer working):

  1. full-screen-warning-container

Modified December 22, 2015 at 1:38:37 PM PST by TBSdota

Chosen solution

As you may know, the purpose of this is to alert you that the site has invoked full screen in case you were not expecting that to happen, since evil sites may use full screen to emulate a site you trust.

This full screen message changed in Firefox 43, and there are some new settings which control how soon and how long the message is displayed. Probably of most interest to you if you never want to see the warning is the following:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste FULL- and pause while the list is filtered

(3) Double-click the full-screen-api.warning.timeout preference and enter the display time. For example:

  • 3000 => displays for 3 seconds (default)
  • 500 => displays for 1/2 second
  • 0 => no display at all

Read this answer in context 👍 8

All Replies (3)

Chosen Solution

As you may know, the purpose of this is to alert you that the site has invoked full screen in case you were not expecting that to happen, since evil sites may use full screen to emulate a site you trust.

This full screen message changed in Firefox 43, and there are some new settings which control how soon and how long the message is displayed. Probably of most interest to you if you never want to see the warning is the following:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste FULL- and pause while the list is filtered

(3) Double-click the full-screen-api.warning.timeout preference and enter the display time. For example:

  • 3000 => displays for 3 seconds (default)
  • 500 => displays for 1/2 second
  • 0 => no display at all

Ko jehaipyre ndahekopyahuvéima, upévare hetepy ikatu ndoikovéima.

Если Firefox показывает вам запрос “Внимание: Плагин не отвечает”, это означает, что плагин, например, Flash потратил больше времени, чем ожидалось, на выполнение запрошенных вами действий. В данной статье рассматриваются некоторые решения и обходные пути.

How to re-enable the aboutconfig warning message in firefox 3

Оглавление

  • 1 Какое действие я должен предпринять?
  • 2 Предотвращение зависания плагинов
  • 3 Отключите это предупреждение

Если вы получите это предупреждение один раз, вы можете попробовать нажать Продолжить , чтобы дать плагину больше времени для завершения запроса. Это не всегда может быть успешным. Если вы получите это предупреждение во второй раз, вам следует, вероятно, нажать Остановить плагин , чтобы заставить плагин немедленно остановиться (упасть).

Вот что нужно попробовать, если вы часто получаете это предупреждение:

  • Обновите ваши плагины.
  • Приостановите плагины (Flash-видео, игры, музыка и т.д.), работающие в других вкладках, или закройте эти вкладки.
    • Для получения более подробной информации о Flash прочитайте статью Проигрывание флэш-видео приводит к зависанию Firefox.

Если вы не хотите получать предупреждения о зависании плагина, то вы можете отключить это предупреждение, установив флажок “Не спрашивать в следующий раз”. Когда вы это сделаете, Firefox позволит плагину зависать в течение максимум 45 секунд перед его падением.

Если вы передумали и хотите снова включить предупреждение, выполните следующие действия:

  1. Введите about:config в адресной строке и нажмите Enter Return .
    Может появиться страница с предупреждением. Нажмите Я принимаю на себя риск! Принять риск и продолжить , чтобы перейти на страницу about:config.
  2. Найдите настройку dom.ipc.plugins.hangUITimeoutSecs .
  3. Щёлкните правой кнопкой мыши по ней и выберите Сбросить Щёлкните по кнопке Сбросить.

Ko’ã tapicha mba’eporã oipytyvõ ojehai hag̃ua:

How to re-enable the aboutconfig warning message in firefox 3

Pytyvõreigua

Ekakuaa ha emoherakuã nerembiapokue ambuéndi. Embohovái porandu ha embotuichave ore kuaapy.

Mozilla Firefox 94 won’t prompt users anymore when they are about to close a browser window with multiple tabs. Previous versions of the Firefox web browser displayed a close prompt in that case, which acted as a security precaution. Firefox 94 and newer won’t display the confirmation anymore, regardless of the way the browser window is closed (with one notable exception)

Firefox users have several options when it comes to closing the browser, e.g. by using the menu or clicking on the close button. It is interesting to note that the keyboard shortcut to close the browser window is not unified. Windows users need to press Ctlr-Shift-Q, while Mac and Linux users Ctrl-Q.

An option to disable the prompt is provided when it is displayed. Firefox up until version 93 has no option in the Settings to enable the prompt again.

How to re-enable the aboutconfig warning message in firefox 3

Mozilla reveals why it decided to change the closing prompt from Firefox on a support page. According to the organization, close actions in the contexts mentioned are “likely intentional”, and that the prompt is “unnecessary” and may provide “unwelcome friction”.

Starting in Firefox version 94, Firefox no longer warns you by default when you exit the browser or close a window using a menu, button, or three-key command. The close actions in these particular contexts were likely intentional and so the messages provided unnecessary and perhaps unwelcome friction.

Firefox 94 and newer displays a close confirmation prompt only on Mac and Linux devices, if the two key shortcut is used, because the risk of accidental closure is higher, according to Mozilla.

The only instance in which a close modal is on by default is for two-key quit shortcuts on macOS and Linux. The risk of accidental closure is higher in this context since the quit shortcut (?+Q) is adjacent to the switch-application shortcut (?+Tab).

Firefox desktop users may enable or disable the closing confirmation prompt at any time in the browser’s preferences, starting in Firefox 94.

How to re-enable the aboutconfig warning message in firefox 3

All it takes is to load about:preferences in the browser’s address bar and check or uncheck the new “Confirm before closing multiple tabs” option that is displayed under Tabs on the page.

Veteran Firefox users may remember that the browser’s advanced configuration includes a preference, browser.tabs.warnOnClose, that determines whether the close prompt is displayed or not. Just load about:config in Firefox’s address bar, paste the preference into the field at the top, and toggle it either to TRUE (enabled) or FALSE (disabled).

How to re-enable the aboutconfig warning message in firefox 3

Mozilla plans to release Firefox 94 Stable on November 2, 2021.

Now you: do you use the close confirmation prompt?

How to re-enable the aboutconfig warning message in firefox 3

About Martin Brinkmann

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Comments

I’ve always set ‘browser.tabs.warnOnClose’ = false

Regarding CTRL+SHIFT+Q, I read many complaints about this but given I’m a mouse aficionado rather than a keyboard fan, it doesn’t bother me.

What does bother me is that if I have several Firefox windows opened, closing Firefox only closes the current Firefox window, good and normal except that other windows include those such as Library (which is still not displayed in a tab), Page Info etc … and that I more than once had only one Firefox GUI opened but as well Library, Page Info, and that closing the Firefox GUI didn’t close the latter, which meant Firefow was still opened. Which is why I’ve added an ‘Exit Firefox’ button (userChromeJS crafted) next to Firefox’s Buttonbox which closes *all* Firefox opened Windows (‘EX’, as well as ‘RS’ to Restart (also a userChromeJS) , and Clock (extension manipulated with CSS) on the left as viewable here : [https://img.justpaste.me/i/20211028/mg13z/ButtonBoxPlus.png].

There is a lesser known about:config pref which allows to consider all opened Firefox windows when closing Firefox : privacy.clearOnShutdown.openWindows // Default=false
If set to true closing Firefox will close all Firefox windows, like my userChromeJS above mentioned, but IMO defaulting Firefox exit to exiting all opened Firefox windows is not a wise idea. The extra button is less problematic.

> Now you: do you use the close confirmation prompt?

I often accidentally close my browser and leave so many tabs open that “Tree Style Tab” is essential (add Auto Tab Discard, Cookie AutoDelete, and LocalCDN), so I need to be prompt.

Well, not only Firefox, but I have it set to “prompt me in situations where the state changes” in every program.
It is true that many users dislike the “prompt” as annoying, so I have seen many programs that have made the prompting feature an opt-in option or removed it.
In programs that do not provide prompting, I add a “prompt” function in a third-party application or similar.

Since I upgraded to jQuery 1.4.4 I’ve been getting several new warning messages when I run my unit tests in Firefox 3.6.13. Here’s a typical one:

Or the even more useful:

The web page renders nicely, and all my JavaScript code seems to be running okay too, so I’m reluctant to spend a potentially large amount of time chopping away at my code to track these messages down. However, can anyone suggest what’s provoking the warnings?

How to re-enable the aboutconfig warning message in firefox 3

How to re-enable the aboutconfig warning message in firefox 3

2 Answers 2

You likely have something like this:

. and something else along these lines:

in both these cases your variables being empty would error, since “” and “selector[!=value]” aren’t valid selectors. Just look were you’re using variables in selectors, and add if() checks so they don’t run if the selector would be invalid in those cases (sometimes an empty string in the variable is just fine, depends where it’s being used).

How to re-enable the aboutconfig warning message in firefox 3

Basically, Firefox has strict rules for javascript and will return errors on trivial matters that do not affect the javascript code from running. Off the top of my head defining variables without var will create some sort of warning in the error console, although it is perfectly fine to do so. These sort of coding practices are normal for minifying javascript and making javascript overall leaner and run faster – you will notice that most of these errors actually occur in jQuery itself.

You can read more on Firefox strict javascript errors here: http://www.howtocreate.co.uk/strictJSFirefox.html

It is possible to turn off strict warnings, but probably not advisable while you are developing.

TL;DR: Don’t worry about them if everything works, FF is just overly fussy.

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Akemi Iwaya has been part of the How-To Geek/LifeSavvy Media team since 2009. She has previously written under the pen name “Asian Angel” and was a Lifehacker intern before joining How-To Geek/LifeSavvy Media. She has been quoted as an authoritative source by ZDNet Worldwide. Read more.

Have you ever added a custom about:config entry to your Firefox browser and then wished that you could remove it? Now you can with a simple reset tweak that focuses on singular entries.

Note: It is highly recommended to keep a set of notes or listing of any modifications that you make to your about:config settings (default or custom entries). This is an extremely valuable asset if you need to undo changes at a later date.

The browser version used in our example is Firefox 3.5-beta99 and the custom added about:config entry is “nglayout.initialpaint.delay”.

Digging into about:config

To get started, type “about:config” (without the quote marks) into the address bar and hit “Enter”. With the new beta version this is the message that you will see once you have hit “Enter” (unless you have previously deactivated this window by deselecting “Show this warning next time”). Click on “I’ll be careful, I promise!”.

Once you have clicked through, your browser window is going to look like this.

How to re-enable the aboutconfig warning message in firefox 3

Since we know the exact custom about:config entry we are looking for, type or paste “nglayout.initialpaint.delay” (without the quote marks) into the “Filter” address bar (you do not need to hit “Enter” in order for the entry to display). And there is the entry we are looking for sorted out by itself.

How to re-enable the aboutconfig warning message in firefox 3

Now we can make the tweak that we need to remove this custom entry from Firefox’s about:config entry set. Right click on the individual about:config entry line and select “Reset”.

How to re-enable the aboutconfig warning message in firefox 3

Once you have clicked “Reset”, notice that the about:config entry is no longer in bold print, has been changed from a “user set integer” to a “default string”, and is now blank in the “Value” area.

How to re-enable the aboutconfig warning message in firefox 3

At this point, you will need to restart your browser. Once you have restarted, it is time to verify that the custom about:config has been removed. Repeat the process of opening up the about:config window as listed as above and once again enter the name of the custom entry into the “Filter” address bar.

How to re-enable the aboutconfig warning message in firefox 3

As you can see, the entry no longer exists…you have effectively erased it from your browser!

Conclusion

If you like experimenting with custom about:config entries in order to increase your browser’s performance, this tweak can be extremely useful to undo a change that may not be working very well for you. Have fun tweaking your browser!

Google Chrome and Mozilla Firefox are the most used web browsers today. One of the most impressive features found on both of those web browsers is the amount of available free extensions or add-ons that you can download and install to modify the existing behavior of the browser or even add new features such as a FTP client (FireFTP), download manager (DownThemAll!), or advertisement blocker (Adblock Plus) without requiring a dedicated third party software. Currently there is more than a whopping 12,000 extensions that can be installed on the current Firefox.

Although the extensions are very useful, the constant browser updates which are released every month can cause some of the extensions to stop working if they are programmed to only run with specific versions of Firefox.

How to re-enable the aboutconfig warning message in firefox 3

This is actually a safety feature to allow the extension developers to fully test and verify that their extension is compatible with the latest Firefox and not crashing it. However there are times when it reports that the extension is incompatible with Firefox or you cannot install because the Add to Firefox button is grayed out with a text saying not available for Firefox. Here we have 4 ways to force the installation of incompatible extensions in Firefox.

1. Nightly Tester Tools

The Nightly Tester Tools is an extension for Firefox which has the ability to disable add-on compatibility checking. After installing the extension, restart your Firefox web browser, press Alt+T to show the menu bar, go to Nightly Tester Tools and select “Force Addon Compatibility“.

How to re-enable the aboutconfig warning message in firefox 3

After enabling the force addon compatibility option, you can now forcefully enable an incompatible addon. Go to the Add-ons Manager window by pressing Ctrl+Shift+A, right click on the incompatible add-on and select Enable. Please ignore the the warning message that is shown in the Add-ons Manager telling you that the compatibility checking is disabled and you may have incompatible add-ons.

2. Disable Add-on Compatibility Checks

On older versions of Firefox, it is possible to easily disable add-on compatibility checks by simply toggling the extensions.checkCompatibility preference from the about:config to false. However since version 3.6, Firefox requires you to include the application version at the end of the preference. This would be an inconvenience because Firefox is updated every month which means you’ll need to recreate a new preference name on every major release.

How to re-enable the aboutconfig warning message in firefox 3

To get through this problem, an addon called Disable Add-on Compatibility Checks can be used to reinstate the retired extensions.checkCompatibility preference without respect to the current application version. Install the addon and there’s nothing to configure.

3. Editing Extensions.checkCompatibility Preference

If you belong to the advanced user group who would prefer to learn how to manually change the Extensions.checkCompatibility preference to disable the extension compatibility checking, here are the steps.

3a) First you need to identify the version of Firefox that you’re running. You can either view it in About Firefox from the Help menu bar or visit the internal URL about: or about:support.

How to re-enable the aboutconfig warning message in firefox 3

3b) Access the URL about:config from the address bar and click “I’ll be careful, I promise!” button.

3c) Right click in the window, go to New and select Boolean.

3d) When asked to enter the preference name, type extensions.checkCompatibility.31.0 and click OK. You may need to replace the 31.0 with the version number that you see from step 3a.

3e) Select “false” as the boolean value and click OK.

How to re-enable the aboutconfig warning message in firefox 3

The changes take effect immediately without requiring you to restart Firefox. Take note that you’ll need to recreate a new preference name of extensions.checkCompatibility with the current version number whenever Firefox is updated.

4. Hacking the Extension

You can find an instruction on the minimum and maximum version number of Firefox that the extension can be installed on and this value is added by the extension programmer. Fortunately it is possible to edit the extension and increase the maximum version number so that even the outdated extension can be installed on a newer version of Firefox.

4a) Go to the webpage of the extension that you would like to install. Right click on the grayed out “Add to Firefox” button and select “Save Link As…“. Firefox will now download the add-on file which has a .XPI extension.

4b) Locate the XPI file that you’ve downloaded, right click on it and open with 7-Zip.

How to re-enable the aboutconfig warning message in firefox 3

4c) In 7-Zip, right click on the install.rdf file and select Edit. It is advisable to use a better text editor such as Notepad++ to edit the install.rdf file because Windows Notepad does not recognize new line breaks. You’ll need to configure 7-Zip to use Notepad++ as the default editor from Tools > Options > Editor tab.

How to re-enable the aboutconfig warning message in firefox 3

4d) Locate the code in the text editor and take note of the value for maxVersion. As you can see from the screenshot below, this extension can only be installed on Firefox starting from version 1.0 up to 3.1b2pre. Simply change the maxVersion value to a number that is equivalent or higher than the current version and save the changes.

How to re-enable the aboutconfig warning message in firefox 3

4e) 7-Zip will detect that the install.rdf file was modified and will prompt you if you want to update it in the archive. Click the OK button.

How to re-enable the aboutconfig warning message in firefox 3

4f) The final step is to drag the modified XPI file onto the Firefox window and will prompt you to install instead of telling you that the extension could not be installed because it is not compatible with Firefox.

After apply the security update RHSA-2014:1919, Firefox may issue an error message such as the attached one when connecting to certain sites, stating that there are “no common encryption algorithm(s)”, giving the “ ssl_error_no_cypher_overlap ” error code.

How to re-enable the aboutconfig warning message in firefox 3

There are two ways to resolve this issue, one applying to an individual user, and one system-wide.

User-specific configuration

The following steps have to be applied for each user who needs to connect to sites which only support the protocol version, SSL 3.0.

  1. Start Firefox.
  2. Enter “ about:config ” in the URL bar.
  3. If a warning message is shown, acknowledge it. (Making the changes described below does not invalidate support coverage.)
  4. Enter “ security.tls ” in the “Search” field. Among other entries, the item “ security.tls.version.min ” will appear. Double-click on this entry.
  5. A dialog box, “Enter integer value” will appear. Replace the value “1” in the input field with “0”, and click on “OK”. The configuration setting should look as shown in the picture below.
    How to re-enable the aboutconfig warning message in firefox 3
  6. Visit the site which supports SSL 3.0 only to verify that the configuration change was effective.

System-wide configuration

These settings will change the defaults for all users on the system to which they are applied.

Mozilla has added a permanent Firefox HTTP Warning in its advance browser.

Day after day, the browsers have been getting more and more stringent in regard to their approach towards unsecured (HTTP) websites, and Mozilla is about to take the next step and add a permanent Firefox HTTP warning for all non-HTTPS sites.

Firefox Nightly, a pre-release version of Firefox has just gotten its latest update (version 59), and it has a provision that will warn users when he/she lands on any HTTP website, regardless of whether he/she enters any information or not. Nightly gives a sneak peek into the upcoming Firefox versions and the changes coming with it. Right now, the Firefox HTTP warning is only displayed in the form of a red line over a padlock.

And then when clicked:

If you want to activate the Firefox HTTP warning, you’ll have to do it manually.

To enable this permanent warning on Nightly 59, you must enable a hidden setting. Here’s how to do it:

  1. Type in about:config in the address bar and press Enter. You’ll get a host of configuration options in here.
  2. Search for ‘insecure_connection_icon.enabled’ in the search field.
  3. Double click on insecure_connection_icon.enabled. The Status will be changed from default to modified, and this feature will be enabled.

Will we see this change taking place in Firefox? If yes, when?

It’s no secret that the browser community will mark all HTTP sites ‘Not Secure’ eventually. When exactly? Nobody knows. Though the smart money is sometime next Spring, my guess is April. One thing is for sure is though, the browsers will keep on raising the level regarding the stringency. These warnings are expanding and becoming more severe by the update.

So, the earlier you get your website secured, the better it is for you!

How to disable Firefox 3.5 Security warning sound

Posted June 30th, 2009, 10:43 pm

Posted June 30th, 2009, 10:52 pm

Posted June 30th, 2009, 11:19 pm

Posted June 30th, 2009, 11:34 pm

Posted June 30th, 2009, 11:34 pm

Posted June 30th, 2009, 11:42 pm

I looked in about:config in 3.5 and see only one “sound” pref, the same as in older Firefox versions – for the Find bar = accessibility.typeaheadfind.soundURL and accessibility.typeaheadfind.enablesound

I won’t say I never heard that sound you mentioned, ’cause I keep my sound system off until I want to listen to something – usually pRon, LOL.

Posted June 30th, 2009, 11:51 pm

Posted July 1st, 2009, 5:59 am

If the dialog box has an exclamation mark in it, such as the View an encrypted page, or the leave an encrypted page for one that isn’t encrypted pops up, for some reason it plays Windows XP’s ‘Exclamation’ noise that you can see in the control panel -> sound and audio devices -> sounds. It is specific to the Firefox dialog boxes that have an exclamation mark next to them, and does not happen then one has a question mark such as the one asking you to close multiple tabs. So what’s the solution?

causes this sound –>

no sound

Posted July 1st, 2009, 6:10 am

Posted July 1st, 2009, 6:20 am

Posted July 1st, 2009, 6:31 am

Nothing ever said Firefox wouldn’t use system sound events, and these are security warning dialogs so the idea is to get the user’s attention. And I’m pretty sure they made this change for a reason, so if you file a bug, it will probably be WONTFIXed pretty quickly.

Also, I don’t know of any other program that lets you selectively turn off system event sounds.

Posted July 3rd, 2009, 6:07 am

Posted July 5th, 2009, 4:52 pm

Could it be that these security warnings are now true (the default, I think), whereas they used to be false?

Another option is to set the two Sound variables to something else. Either :
– accessibility.typeaheadfind.enablesound = false (default is true)
– accessibility.typeaheadfind.soundURL = something else than beep (but I don’t know what would be a proper value.

Posted July 7th, 2009, 10:24 pm

Posted July 10th, 2009, 6:35 pm

Bluefang wrote: Nothing ever said Firefox wouldn’t use system sound events, and these are security warning dialogs so the idea is to get the user’s attention. And I’m pretty sure they made this change for a reason, so if you file a bug, it will probably be WONTFIXed pretty quickly.

Also, I don’t know of any other program that lets you selectively turn off system event sounds.

I can understand why they decided to have Firefox use the system’s sound for warnings, but this is too annoying a behavior, especially considering that it never did so before. As it is, every time I want to empty the spam folder in my Yahoo Mail, I hear the alert beep from Firefox. this alert sound is typically reserved for something much more serious than whether or not I’d lose all of my suspected spam mail. Once I’ve skimmed through for false positives, I want them all gone so that I don’t have to skim through the same messages again.

They should give us an option to enable or disable the use of the alert sound.

A webcam software that came with my system also used one of my system’s sounds for an action. Whenever I clicked on an effect, it would beep. Also very annoying, but there was an option to disable it.

Whenever I switch a video in Firefox to full screen, a message appears at the top edge of the screen, that the website is full screen now.

I find this quite annoying and unnecessary as I am the one switching to full screen. Is there a way to disable this message?

1 Answer 1

In the Firefox address bar type about:config and hit enter, then click the I accept the risk button.

Then search for full-screen-api.warning.timeout and set its value to 0 .

After this change the message is not displayed any more when switching a video to full-screen, but you still get the message when you move the cursor to the top edge of the screen.

If you want to disable the warning completely, you’d also have to change the value for full-screen-api.warning.delay to -1 . This change prevents the warning from being displayed if you move the cursor to the top screen edge.

Reminder

Please be reminded that doing this might be a security risk. Take a look at , the article provided in the comments under the question by Duncan X Simpson. This site shows how an attacker could use the full screen API to fake a website to gain access to the credentials of your online-accounts. You shouldn’t “click the link” on that site unless you’re able to figure out what’s going on behind the scene; just read.

But as the warning pops up for only three seconds by default, one could miss the warning due to looking away from the screen at that moment for some reason. For real security the warning shouldn’t time out but stay on the screen until one clicks to hide it (that would be work for the firefox team).

However, 100% security never exists and as always we have to weigh security against convenience, so if you disable the warning, keep your eyes open!

Are you getting a secure connection failed in Firefox browser? There are a couple of ways in which you can fix the Firefox secure connection failed error and we would discuss them in this article.

Secure Connection Failed in Firefox – How to Fix This Error

Solution #1: Check your Security Software for SSL Scanning

Every security software on the market has a feature called SSL Scanning or SSL filtering. This is a feature that is designed to make sure that you do not accidentally visit a website with expired SSL Certificate (this is an algorithm that is supposed to protect your data on any website it is installed on). However, sometimes your security software could prevent you from visiting a website because it has tagged the SSL Certificate of that website as expired or invalid.

To fix this, you need to visit the settings option of whichever security software that you are using and locate the SSL scanning feature of the software. Once you find it uncheck the box that indicates if it is enabled. Once you disable this feature on your security software, you should try visiting the website again.

If this error persists then you should try the next solution.

Solution #2: Change the SSL Setting of Your Firefox browser

Step #1: The first thing you need to do is type in the address bar of your Firefox browser the command “About:Config

Step #2: A pop-up box should show up with the warning “This might void your warranty!” click on the option I accept the risk!

How to re-enable the aboutconfig warning message in firefox 3

Step #3: In the search box that comes up, type the words “security.ssl.enable_ocsp_stapling”.

Step #4: The value of the new result that pops up will indicate “true.” Double click on the value to change it to “false”.

Step #5: Try connecting to the website that you are trying to visit and see if this has fixed the error. If this doesn’t work, go to the next solution.

Solution #3: The Proxy Setting of Your Firefox Browser

When the proxy setting of your computer is not properly set to surf the internet, then you might also get this error. To solve this problem, please consider the below steps.

Step #1: On our Firefox menu bar, navigate through Tools Menu and click on the option tab.

Step #2: On the new page that shows up, navigate to the advance panel and click on the tab that is labeled Network.

Step #3: In the connection field that is open, click on the button labelled as Setting.

Step #4: A new pop-up box should appear on your screen with the title Connection Setting.

Step #5: In the connection window that you now have opened, look for Manual Proxy Connection and check if it is selected.

Step #6: If the Manual Proxy Connection is selected, then it means you will have to verify all the protocol fields by yourself. However, if you are not sure what to do about anything in this window, it is strongly recommended that you contact your network administrator.

Step #7: If the Manual Proxy Connection is not selected, then leave it as it is and close the Connection Setting Window and call your network administrator.

Finally, you should check If SSL is installed properly or not. If SSL is not configured properly then it may throw such type of error. Moreover, you should update the Firefox timely as new updates may revoke old algorithm support or other security changes.

How to re-enable the aboutconfig warning message in firefox 3

3Disabling images on your internet browser can help you improve and save on your bandwidth. This article will teach you how to disable images in Firefox browser.

If you are on a limited-internet plan or a pay-per-usage internet plan, you want to save bandwidth as much as you can. Less bandwidth usage equates to lesser internet fees. One of the bandwidth-extensive files are the images especially those that are set to high-resolution. These images can be as high as 10 MB. If the purpose of your browsing is only information and text-reading, then you can save on your bandwidth by disabling the display of images. After reading this tutorial, you will know how to disable images in Firefox, save on your bandwidth use, and have a faster browsing experience.

How to Disable Images in Firefox

You can configure Firefox to disable the display of images in Firefox browser by following the easy steps below:

1. Open your Firefox browser from the desktop.How to re-enable the aboutconfig warning message in firefox 3
2. In Firefox’s browser address bar, type about:config and press Enter.How to re-enable the aboutconfig warning message in firefox 3
3. Click on I’ll be careful, I promise! as shown in the screenshot below. Firefox can be playful and creative with the choice of words. Depending on your Firefox version, the button’s name can be different.How to re-enable the aboutconfig warning message in firefox 3
4. In the search bar below the address bar, scroll down and search for permissions.default.image. You can see that the value of the integer is set to 1. The value 1 represents that the default display of images is enabled.How to re-enable the aboutconfig warning message in firefox 3
5. Double click on the row of preference named permissions.default.image. Alternatively, you can also right-click the preference named permissions.default.image and click Modify to change the integer value.How to re-enable the aboutconfig warning message in firefox 3
6. Change the integer value to 2 and click the OK button.How to re-enable the aboutconfig warning message in firefox 3
7. Display of images in Firefox is now disabled.
To re-enable setting to load images automatically, repeat the same steps and change the value of permissions.default.image preference to 1.

Important Note:
Support values for permissions.default.image are:
1 – allows all images to load
2 – blocks all images
3 – allows only images from the same site to load and blocks third-party images

Frequently Asked Questions

Q: I would like to block images only from the advertisements and third-party cookies. How can I do that?
A: You can follow the same steps as above but instead of using the integer 2, use the integer 3 to allow images only from the site you are visiting and blocking any image from third-party sites and cookies.

Q: Will closing Firefox retain the settings on image display?
A: Closing Firefox and restarting your computer will save any changes you made to the program. If you chose to disable image display, images would still be disabled on your next Firefox session.

Q: WIll reinstalling and updating Firefox retain the settings on image display?
A: Reinstalling Firefox will set the settings back to default. All changes to the program, including the customization of image display, is removed and is set back to the default settings. Updating Firefox will retain your program’s settings including the integer for image display.

Q: I have changed the integer back to 1 to display images, but images on the site are still not shown. Can you help me on this?
A: You need to refresh the site to load the images. If reloading the website won’t work, try closing and opening Firefox. If all else fail, uninstall and install Firefox’s latest version.

You just learned how to disable images in Firefox. We hoped that this article helped you in saving costs, improving your bandwidth, and having a better Firefox browsing experience. If you have questions about any of the information in this article, let us know in the comments.

Change these settings in Firefox for the best private web browsing experience.

Make these changes to Firefox’s settings for the best private web browsing experience.

With a just a tiny amount of tweaking, Mozilla Firefox becomes the most private and secure mainstream web browser (not including Tor or other Firefox-based browsers). When configured right, it’s open-source, blocks ads and trackers, forces HTTPS, and more.

Firefox also makes it easy to install additional privacy-focused extensions for even more privacy protection.

The best part is, these changes are free, easy, and can be completed in less than 5 minutes. Here’s how to improve your Firefox privacy with some simple tweaks.

Firefox Privacy Settings‘ Contents (select to expand)

How to Improve Firefox Privacy and Security by Adjusting Your Settings

You can make Firefox a lot safer just by altering a few of its built-in settings. You’ll find these by opening the Menu from the top-right corner of your browser window and then selecting Options.

Once you’re in the Options menu, use the sidebar on the left to select Privacy & Security – and then make these simple tweaks.

Blocking Trackers in Firefox Settings

Changing these settings will tell Firefox to block websites and other parties that may be trying to track your online activity.

  1. Under Tracking Protection, select Always
  2. Under Send websites a “Do Not Track” signal that you don’t want to be tracked, select Always

Securing Your Browsing History

Firefox will automatically clear your browsing History every time you close the browser if you enable either of the following options.

  1. Under History, use the dropdown menu to select Firefox will… Use custom settings for history; from there, make sure that Always use private browsing mode is enabled
  2. Under History, use the dropdown menu to select Firefox will… Never remember history

Blocking Pop-Up Windows

Pop-ups are not only annoying, they’re a security risk. Block them under Permissions by enabling:

  • Block pop-up windows
  • Warn you when websites try to install add-ons
  • Prevent accessibility services from accessing your browser

Enhancing Security and Blocking Potential Threats

To help protect yourself from potential malware, phishing, and other attacks, enable these settings under Security:

  • Block dangerous and deceptive content

This should automatically select the two options below it. If not, check them as well.

Stop Autofilling, Password Saving, and URL Suggestions

Stop Firefox from remembering your password and making autofill suggestions based on your browsing history.

  1. Under Forms & Passwords, uncheck any of the checked boxes
  2. Under Address Bar, uncheck any of the checked boxes

Change Your Default Search Engine

By selecting Search in the left sidebar of the Options menu, you can change your default search engine for your Firefox address and search bars.

  • Under Default Search Engine, select DuckDuckGo from the dropdown menu for a more private alternative to Google

Using Firefox’s about:config Settings to Really Improve Your Privacy

To access the about:config settings, simply type about:config into the URL bar and press enter. You’ll get a warning message. Click I accept the risk!

Disabling WebRTC

WebRTC is a JavaScript-based protocol that can end up leaking your IP address. If you’re using a VPN, this isn’t a huge deal (you can read about the best VPNs for stopping WebRTC leaks), but it’s still a good idea to fix it.

From the about:config menu, simply:

  1. Find media.peerconnection.enabled
  2. Double click it, so that the Value changes to false
  3. Use this WebRTC leak test to make sure it’s fixed (if no IP addresses are shown, you’re good to go!)

This should stop any WebRTC leaks, but you can also tweak these settings to make sure.

  • Set media.peerconnection.identity.timeout to 1
  • Set media.peerconnection.turn.disable to true
  • Set media.peerconnection.use_document_iceservers to false
  • Set media.peerconnection.video.enabled to false

Wrap-Up

Taking these steps to change your settings will drastically improve your Firefox privacy and security.

If you want to take your privacy game to the next level, you should consider installing these privacy-enhancing extensions or add-ons for Firefox too.

Taylor Gibb is a professional software developer with nearly a decade of experience. He served as Microsoft Regional Director in South Africa for two years and has received multiple Microsoft MVP (Most Valued Professional) awards. He currently works in R&D at Derivco International. Read more.

How to re-enable the aboutconfig warning message in firefox 3

The latest version of Firefox adds support for native Facebook integration, however the setting to enable it is hidden in about:config. Here’s how to enable it.

How to Enable Facebook Integration in Firefox

Open Firefox and head over to about: config.

How to re-enable the aboutconfig warning message in firefox 3

You will be given a sarcastic warning about voiding your warranty, just click on the I’ll be careful button to continue.

How to re-enable the aboutconfig warning message in firefox 3

Now type social into the search box, you should see a setting called social.enabled which will initially have a value of false. Double click on it to set the value to true.

How to re-enable the aboutconfig warning message in firefox 3

As soon as you do that you should see a Facebook bar appear on the right hand side of the Firefox Window, click on the Log In button.

How to re-enable the aboutconfig warning message in firefox 3

This will redirect you to the Facebook website where you can go ahead and login.

How to re-enable the aboutconfig warning message in firefox 3

Once logged in you will be able to see updates and notifications as well as who’s online directly from your browser, without having to visit the Facebook website.

The CSS property backdrop-filter allows you apply graphical effects like blur and color filters to the background of your element. This property can help you create awesome effects in your webpage.

But, there is one problem. Its not supported in Internet Explorer and Firefox. The good news is you can enable it in Firefox. So, if you are a Firefox user, you can still test your webpages that use backdrop-filter . But, even if you enable it in your browser, most likely, it won’t be enabled in your clients’ browser. So, you should always design your pages so that it looks good with and without backdrop-filter enabled.

According to caniuse, backdrop-filter can be enabled in Firefox versions 70 and above. To enable this property, follow these steps:

Open a new Firefox tab and type about:config in the address bar. Press Enter.

You should see a warning. Click on the button saying Accept the Risk and Continue. This message is shown because on this page, all experimental features are present which may produce glitches when enabled and hinder performance, including the backdrop-filter .

How to re-enable the aboutconfig warning message in firefox 3

  • Type layout.css.backdrop-filter.enabled in the search bar. You should see the value is set to false. On the extreme right, there is a reversible arrow (or whatever you call it). Click it to change the value to true.
  • Next, type gfx.webrender.all in the search bar. Its should also be false by default. Change it to true similarly.

Now you can close the tab and see backdrop-filter in action. Remember that it might produce glitches, so, don’t panic, we can only wait for the developers to fix those glitches in the near future.

I am maintaining a few web applications. The development and qa environments use invalid/outdated ssl-certificates.

Although it is generally a good thing, that Firefox makes me click like a dozen times to accept the certificate, this is pretty annoying.

Is there a configuration-parameter to make Firefox (and possibly IE too) accept any ssl-certificate?

EDIT: I have accepted the solution, that worked. But thanks to all the people that have advised to use self-signed certificates. I am totally aware, that the accepted solution leaves me with a gaping security hole. Nonetheless I am to lazy to change the certificate for all the applications and all the environments.

But I also advice anybody strongly to leave validation enabled!

How to re-enable the aboutconfig warning message in firefox 3

10 Answers 10

Try Add Exception: FireFox -> Tools -> Advanced -> View Certificates -> Servers -> Add Exception.

I ran into this issue when trying to get to one of my companies intranet sites. Here is the solution I used:

  1. enter about:config into the firefox address bar and agree to continue.
  2. search for the preference named security.ssl.enable_ocsp_stapling .
  3. double-click this item to change its value to false.

This will lower your security as you will be able to view sites with invalid certs. Firefox will still prompt you that the cert is invalid and you have the choice to proceed forward, so it was worth the risk for me.

How to re-enable the aboutconfig warning message in firefox 3

Go to Tools > Options > Advanced “Tab”(?) > Encryption Tab

Click the “Validation” button, and uncheck the checkbox for checking validity

Be advised though that this is pretty unsecure as it leaves you wide open to accept any invalid certificate. I’d only do this if using the browser on an Intranet where the validity of the cert isn’t a concern to you, or you aren’t concerned in general.

Instead of using invalid/outdated SSL certificates, why not use self-signed SSL certificates? Then you can add an exception in Firefox for just that site.

Using a free certificate is a better idea if your developers use Firefox 3. Firefox 3 complains loudly about self-signed certificates, and it is a major annoyance.

If you have a valid but untrusted ssl-certificates you can import it in Extras/Properties/Advanced/Encryption –> View Certificates. After Importing ist as “Servers” you have to “Edit trust” to “Trust the authenticity of this certifikate” and that’ it. I always have trouble with recording secure websites with HP VuGen and Performance Center

Create some nice new 10 year certificates and install them. The procedure is fairly easy.

Start at (1B) Generate your own CA (Certificate Authority) on this web page: Creating Certificate Authorities and self-signed SSL certificates and generate your CA Certificate and Key. Once you have these, generate your Server Certificate and Key. Create a Certificate Signing Request (CSR) and then sign the Server Key with the CA Certificate. Now install your Server Certificate and Key on the web server as usual, and import the CA Certificate into Internet Explorer’s Trusted Root Certification Authority Store (used by the Flex uploader and Chrome as well) and into Firefox’s Certificate Manager Authorities Store on each workstation that needs to access the server using the self-signed, CA-signed server key/certificate pair.

You now should not see any warning about using self-signed Certificates as the browsers will find the CA certificate in the Trust Store and verify the server key has been signed by this trusted certificate. Also in e-commerce applications like Magento, the Flex image uploader will now function in Firefox without the dreaded “Self-signed certificate” error message.