How to make adobe pdfs load faster in mozilla firefox

Mozilla Firefox is one of the most useful and popular internet browsers in the market. With its plethora of useful apps and plugins, Firefox has become a very useful browser to have for both businesses and personal use.

Moreover, the web developers at Mozilla are consistently working on making important changes to make the Firefox browser faster.

Although Firefox is considered quite fast, over time you may be prone to download apps and plugins that slow the overall experience and loading times.

In this article, we will explain a step by step process to make the Firefox browser faster and more efficient by editing the about:config file. In addition to editing the config file, we’ll also go over some other plugins and things you can do to greatly increase the speed if Mozilla Firefox.

about:config is a feature of Mozilla Firefox that allows the users to change and manipulate the preferences on Firefox on a more complex level.

It lists application settings that are known as preferences. The preferences are read from profile files user.js and prefs.js and application defaults. Many of these application settings are not seen in the Preferences menu.

Using about:config is one of many methods of modifying preferences and adding other “hidden” ones to increase the speed and enhance the performance of Mozilla Firefox. It is also one of the main benefits of using the browser – Firefox gives its users’ customization features that many other browsers simply don’t have.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

In order to open about:config in Mozilla Firefox, type “about:config” in the address bar and press “Enter“.

This displays the list of various settings, as shown in the picture above. You might see a warning message, “This might void your warranty!”. Just click the button, “I accept the risk” or “I’ll be careful, I promise!” to continue.

You can also use the checkbox out there for avoiding the warning in the future.

Adding or Changing Preferences

In order to add a new preference or change the existing ones, right-click anywhere in the provided list of preferences. In the context menu, select “New”, then select the type of preference that you are going to add or modify.

    String is a sequence of text. Integer is a number. Boolean is true-false value.

To reset a preference to its default value or to remove an added preference, right click on the required preference and select the “Reset” option. If you added the entry via about:config, the preference will no longer be listed after restarting the program.

How to Speed-up Firefox Using About:config?

Now that we have learned how to open about:config, and change and add preferences, we can speed up our browser by following the steps given below:

Normally, the browser makes only one request to a web page at a time. If we enable “pipelining” from about:config, it will make several requests at once, which really speeds up the loading page.

STEP 1: Opening the Config in Your Browser

Type “about:config” into the location bar and hit Enter.

STEP 2: Adjust the Pipelining Settings

Search the following entries by entering them in the search bar. You can double-click on each entry to change its value.

First, set “network.http.pipelining” to “true”.
Now, set “network.http.proxy.pipelining” to “true”.
Then change “network.http.pipelining.maxrequests” to a larger number like 8.
(This means that it will make about 8 requests at once)

Now search for max-connections in the search bar.

Change “network.http.max-connections” to 96.
Then, change “network.http.max-connections-per-server” to 32.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

STEP 3: Adjust the Delay Option

Finally, right-click anywhere and then select New and then Integer value.

Name it “nglayout.initialpaint.delay” and set its value to 0 i.e. “Zero”.

This value is the total amount of time that the browser waits before it acts on the information it receives. If you have a broadband connection, you’ll load pages faster now.

Optionally, here are some more options for your about:config to increase the speed.

Set “network.dns.disableIPv6” to “false”
Then, set “plugin.expose_full_path” to “true”

Speedup Extensions to Make Mozilla Firefox Faster

There are some extensions which when installed can make your page load faster in Firefox. Installing too many extensions makes Firefox slower but if there are already a few extensions installed, you can use these methods to increase the speed of your browser.

  1. Disconnect: Disconnect loads pages faster and blocks tracking ads.
  2. Speedyfox: Another extension to speed up your browsing.
  3. Ghostery: Another great Firefox extension that blocks ads and speeds up browsing.

General methods to make Mozilla Firefox faster

These are not exactly methods to amplify your speed but these things should be kept in check so that no external factors are lagging the speed of your browser. The things to consider are given below:

  1. Clear browsing history regularly.
  2. Remove unnecessary add-ons.
  3. Remove unnecessary toolbars.
  4. Disable Flash.
  5. Disable Firefox Auto-update.

These are the methods that you can apply to make Firefox faster and more efficient. The main method is by altering your about:config preferences. However, other methods given above can also be used along with the about:config method to increase the browsing speed.

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Приватность «из коробки» уже здесь. Загрузите Firefox, чтобы блокировать свыше 2000 трекеров.

Загрузить Firefox — Русский

Ваша система может не удовлетворять требованиям Firefox, но вы можете попробовать одну из этих версий:

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How to Make Adobe PDFs Load Faster in Mozilla Firefox

Посмотрите, что блокируется

Firefox показывает, как много собирающих данные трекеров было заблокировано с помощью Улучшенной защиты от отслеживания.

Сделайте свои пароли переносимыми

Firefox Lockwise делает пароли, сохраняемые вами в Firefox, защищёнными и доступными на всех ваших устройствах.

Отслеживайте утечки данных

Firefox Monitor предупредит вас, если мы узнаем, что ваша информация стала частью утечки данных из другой компании.

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Make Firefox Run Faster : Mozilla Firefox is a popular web browser and used by many internet users around the world. Due to it provide greater customization features and fast speed, users love Mozilla Firefox. According to some tests, the speed of Firefox web browser is more than Google Chrome. But many times, it got slower without an apparent reason. Most of the non-techies will find it difficult to cater the problem of slow Firefox.

Whether you own a high-speed internet connection, a slow browser can not take full benefit of a high-speed internet connection. The problem of slow Firefox includes various issues like Firefox hangs, slow page loading,slow switch from one tab to other, slow startup time of Firefox, frequent crash and issue related to YouTube videos.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

But in this article you will be given best tips to make Firefox run faster. Your question of How to increase Firefox speed will be answered here. This article will give tips which include tweaking Firefox settings & configurations. It will also tell you to do some basic task to speed up Firefox.

Lets proceed on the way to make Firefox to run faster.

Tips To Make Firefox Run Faster: Speed Up Firefox

Below are the some tweaks & basic tasks which can easily speed up your slow Firefox. Lets proceed.

1. Refresh Firefox

Refreshing Firefox is the one of the best way to make Firefox faster. This command of Refresh Firefox will bring most of the Firefox setting to its default. Before you Refresh Firefox, first you should know about what actually happens when we perform Firefox refresh. In Firefox, Profile Folder contain the browser setting and other important data. Before this refresh, Firefox creates a new Profile Folder and back up all of the important Firefox data in this.

Firefox will save Browsing History, Bookmarks, Open Windows & Tabs, Passwords, Auto-Fill info, Cookies and Personal Dictionary.

Which Items Will Be Deleted

  • Themes & Extensions
  • Download History
  • Website Permissions
  • Download History
  • Social Features
  • Plugin Settings
  • Search Engines you have added
  • DOM Storage

How to Make Adobe PDFs Load Faster in Mozilla Firefox

For refreshing Firefox, you need to type about:support in URL bar of Firefox and enter. In Right, you will see a button Refresh Firefox and proceed.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

You can also go to and you will find Refresh Firefox button on this web page. It will work only when you use latest version of Firefox.

2. Clear Browser History

It’s highly recommended to clear your browser history once in a week. Our main aim is to clear cache & cookies of web browser. Though keeping it will speed up loading speed of web page. But if these temporary file will kept for many days then web browser will surely become heavy. In this situation, Firefox will hang and page loading speed will be low.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

You should use CCleaner to clean temporary files from your system. It will efficiently clean all temporary files of web browser installed in your PC.

For deleting browser history from Firefox, Click on Menu > History, Click On Clear Recent History > Select Everything and Clear Now.

3. Pipelining

Pipelining is feature which is built-in the configuration of Firefox and many websites have already talked about this features. Pipelining allows Firefox to send multiple request to web server at a moment. We have enable the feature of Pipelining in order to make Firefox to use it.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

1. In URL bar of Firefox type about:config and hit Enter

2. On this screen, you will see plenty of configuration. We have to look for network.http.pipelining configuration.

3. Below URL bar there will be search box type network.http.pipelining. Now you will have configuration related to Pipelining

4. There will be many configuration related to Pipeling but we have to configure network.http.pipelining.

5. The configuration for network.http.pipelining will be default set to False. You need to double-click on it to set it to True.

6. Now you need to set network.http.pipelining.aggressive and network.http.pipelining.ssl to True. Also set network.http.pipelining.maxrequests to 8. It will be default set to 32.

4. Enable HTTP Cache

By enabling http cache, your Firefox will get rid of most UI lags and other browser slowness issues. For enabling http cache in Firefox, you have follow below steps:

  • Type about:config in URL bar and hit enter
  • Now type browser.cache.use_new_backend in search.
  • Double click on its setting and set it to 1. Before it, it set to 0.
  • Now Firefox will use HTTP cache as it is enabled now.

5. Adblock Plus

Another addon is Adblock Plus which is very famous for blocking ads on any web page. You should install Adblock Plus in order to make web browsing faster. Ads also consumes data in order to load in web page.

6. Safe Mode

Safe Mode is a feature built-in Firefox which disable themes and plugin installed in Firefox. The question is that how safe mode can be beneficial to speedup Firefox. The answer is that when you browse the web in safe mode, theme and plugin will not affect browsing as they are disabled.

It will let you to find that if there is any plugin or theme is the culprit of slow Firefox. After that in normal mode, you should enable all plugins one by one to find that plugin causing slowness.

7. Final

After doing all the above tasks to make Firefox run faster, if your Firefox is still slow then there is only few points you should consider. Uninstall currently installed Firefox and install a fresh copy of latest Firefox. Also uninstall and install all addons.

Still if you are not experiencing faster Firefox then you should upgrade you computer hardware to higher end.

Conclusion: Now Make Firefox Faster

So these are tips and tweaks to make Firefox run faster. If you are experiencing slowness in Firefox then you should apply these tips to speed up Firefox. It is highly recommended to keep number of plugin at minimum as they can consume CPU usage and memory.

If you have nay trick to speed up Firefox tell that in comment section.

Hi cor-el, Thank you for your reply.

I have pdfjs.disabled pref set to true.

I have set the following Content Types to “Always ask”:

  • Adobe Acrobat FDF document
  • Adobe Acrobat XML Data Package File
  • Adobe Form Client Data File
  • Portable Document Format (pdf/adobe)
  • Portable Document Format (doesn/matter)
  • Portable Document Format (binary/octet-stream)
  • Portable Document Format (application/x-pdf)
  • Portable Document Format (application/x-octet-stream)
  • Portable Document Format (application/x-download)
  • Portable Document Format (application/force-download)
  • Portable Document Format (“application/pdf”)

And I just noticed now that Portable Document Format (application/pdf) is set to “Adobe Reader”

With the release of 19.0, Firefox started displaying PDF documents within Firefox itself, which I don’t want. I found a page that directed me to set pdfjs.disabled to true, which I have done, and now Firefox only offers me the option of saving PDF documents — it no longer offers me the option of displaying them with Adobe Reader.

I would like to know how to make Firefox go back to the old behavior of asking me whether I wanted to save the document, or open it with Adobe Reader. So far, I can’t figure out how to do that.

Thanks again for the tips. Please keep them coming.

Load webpages faster by preloading subsequent pages via the script and lazy loading images. Install the plugin and you will feel how your browser becomes faster.

Extension Metadata

Used by

Fast Pageload uses preloading to make your browsing experience feel more fluent and the web overall faster.
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There is no technical effect, as the pages are still loaded normally but for your as human it will feel faster, as the pages builds up instantly after you clicked.

For further speed improvements we lazy load images on the web pages. So only the images you really see are loaded.

Give it a go and feel the magic.

Addon Icon by Freepik ( script that does the actual preloading is by Alexandre Dieulot ( and licensed under the MIT license (

Report this add-on for abuse

If you think this add-on violates Mozilla’s add-on policies or has security or privacy issues, please report these issues to Mozilla using this form.

Please don’t use this form to report bugs or request add-on features; this report will be sent to Mozilla and not to the add-on developer.

This add-on needs to:

  • Access your data for all websites

Learn more about permissions

How to Make Adobe PDFs Load Faster in Mozilla FirefoxFirefox browser from Mozilla is one of the most popular web browsers available. It has a big user base and market share. Mozilla developers are constantly making important changes to make Mozilla faster. Apart from this, Mozilla is doing some strategic changes as well. On the financial front, it has been testing different default search engines in different regions. In this article, we’ll be telling you about some hidden ways to speed up your Mozilla web browser.

P eople prefer Mozilla Firefox due to many reasons like a good variety of extensions and low RAM consumption while running, that makes it better the Chrome. Mozilla is my personal favorite web browser and I find it simpler and faster than its counterparts.

Today, I would like to share some of my tried and tested techniques to speed up the browsing and make Mozilla Firefox faster than ever.

Method 1: Using pipeline to make Mozilla Firefox faster

  1. Type “about:config” into the address bar and press Enter. Now click “I’ll be careful, I promise!How to Make Adobe PDFs Load Faster in Mozilla Firefox
  2. Type “pipelining” in the search box
  3. Search for “network.http.pipelining”. By default it’s false, now set it to true by double clicking on the option.
  4. Now set “network.http.proxy.pipelining” to true by double-clicking it.
  5. Set “network.http.pipelining.maxrequests” to 8 (it’s 32 by default) by double-clicking it. This means it will make 8 requests at once.How to Make Adobe PDFs Load Faster in Mozilla Firefox
  6. Now restart your Browser and you will be experiencing a faster browsing.

Method 2: Speedup extension to make Mozilla Firefox faster

I personally don’t like a lot of extensions installed in my Firefox browser because they are also responsible for slowing down the browser, so if you are not using any extension for long, please disable them. But there are some extension which can make your page load faster in Firefox.

  1. Fasterfox: This is an official extension from Mozilla Firefox to “Make your Sites Faster than a Fox for Firefox!” Download the extension from Here
  2. Speedyfox: Another extension to speed up your browsing. Download the extension from Here
  3. Betterfox: Another official extension by Mozilla “To make browsing experience 15% faster” as it claims. Download this speed up extension Here

Method 3: Random methods to make Mozilla Firefox faster

To be honest with you, this is not even a method to mention, but if you are missing these things then you should give it a try:

  1. Clear browsing history regularly.
  2. Removing unnecessary add-ons.
  3. Removing unnecessary toolbars
  4. Block Flash (Mozilla Firefox has already started disabling flash by default).
  5. Disable Firefox Auto-update(not recommended).

If you follow the step then it will definitely help to increase your browsing speed and provide you a more satisfactory browsing experience.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Also Watch: How To Make Google Chrome Faster

How to Make Adobe PDFs Load Faster in Mozilla Firefox

By default, most downloaded PDF files open in the Internet browser currently in use, usually in a new window or tab. This page will outline how to make the browser download PDF files automatically, rather than open them in a new tab. To proceed, select your browser from the list below and follow the instructions.

To change the name of a PDF file you want to download, right-click the download link and select Save As.

  • Microsoft Edge Legacy
  • Internet Explorer
  • Google Chrome
  • Mozilla Firefox
  • Opera

Microsoft Edge Legacy

Microsoft Edge Legacy does not download PDF files by default and this setting cannot be changed. However, Edge Legacy does give you the option to save a PDF after it opens in the browser.

  1. Open the Microsoft Edge Legacy browser.
  2. Browse to the PDF file you’d like to view or download and click it.
  3. The file should automatically open in the browser window.
  4. To save (download) the PDF, click the icon, located near the top-right corner of the browser window.

Internet Explorer

Similar to Microsoft Edge Legacy, Internet Explorer displays PDF files by default, instead of offering to download them for you. However, downloading a PDF is still possible. Follow these steps to view or download a PDF with Internet Explorer.

  1. Open the Internet Explorer browser.
  2. Browse to the PDF you’d like to view or download and click it.
  3. The file should automatically open in the browser window.
  4. To save (download) the PDF, click the icon, located near the bottom of the browser window. If you do not see the save icon, move your mouse towards the bottom of the browser window, and a black bar should appear, where the save icon is located.

Google Chrome

By default, Google Chrome opens a PDF file in the browser window instead of saving it to the downloads folder. To change how Google Chrome treats PDF files in the browser, follow the steps below.

  1. Open the Google Chrome browser.
  2. Click the icon in the top-right corner of the browser window.
  3. Select Settings from the drop-down menu that appears.
  4. On the Settings window, under Privacy and security, click the Site Settings option.
  5. Scroll down the Site Settings screen to find and click the PDF documents option.
  6. Next to Download PDF files instead of automatically opening them in Chrome, click the toggle switch to set to the Onor Offposition. Chrome downloads a PDF when the toggle switch is set to On and displays a PDF in the browser when set to Off.
  1. Close the Settingstab.

Mozilla Firefox

If you’re using Firefox, follow these steps.

  1. Open the Mozilla Firefox browser.
  2. Click the icon in the upper-right corner of the browser window.
  3. Select from the drop-down menu that appears.
  4. On the left side of the screen, make sure the General option is selected.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

  1. In the Applications section (under the Files and Applications heading), select the Portable Document File (PDF) entry in the Content Type column, and click the down arrow icon to the right.
  2. To make Firefox automatically download PDF files, select Save File from the drop-down menu.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

To have PDF files open in the browser again, repeat these steps and select the Preview in Firefox option or Use other option to choose another program.


By default, Opera opens a PDF file in the browser window instead of saving it to the downloads folder. To change how Opera treats PDF files in the browser, follow the steps below.

  1. Open the Opera Internet browser.
  2. Click the Opera menu button in the upper-left corner.
  3. Select Settings from the drop-down menu that appears.
  4. In the Settings window, under Privacy and security, click the Site Settings option.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

  1. Scroll down to the Site Settings screen to find and click the PDF documents option.
  2. Next to Download PDF files instead of automatically opening them in Opera, click the toggle switch to set to the Onor Offposition. Opera downloads a PDF when the toggle switch is set to On and displays a PDF in the browser when set to Off.
  1. Close the Settingstab.

某些 Creative Cloud 应用程序、服务和功能在中国不可用。

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Why is the Acrobat Create PDF extension for Firefox being upgraded?

Adobe has an existing add-on for Firefox (see the screenshot below) which provides customers an easy way to convert their web pages to high-quality PDFs that they can work with. When Firefox releases version 57, legacy technologies (like add-on SDK and XUL-based) will be phased out and only Web Extension API-based add-ons will be supported. Today, in advance of the Firefox release, Adobe has made a new Web extension available so that customers will have a seamless experience when working with PDFs from Firefox.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

What’s new in the Firefox extension?

The new Firefox extension has additional capabilities that weren’t supported in the earlier add-on:

  • The Open in Acrobat option allows users to open PDFs directly in Acrobat DC from the Firefox browser.
  • Support for 64-bit Firefox on Windows has been added.

Why does the extension need permissions to access my data?

The permission dialogue box (see the screenshot below) is a standard Firefox pop-up menu that will be displayed for every Web extension that users install, regardless of the maker. This dialogue box aims to inform the user about the need for permissions for an extension to function properly.

The Acrobat Create PDF extension needs to access the web page to convert it into a PDF in Acrobat DC. The extension does not access or collect any user or profile data or any other Personally Identifiable Information (PII) data.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Will my extension be automatically updated with Acrobat update?

Yes, your extension will be automatically updated when you update Acrobat DC to the latest release. However, you will need to do the following steps to enable the extension in the Firefox browser and you can choose not to enable the extension if you so desire:

  1. Click the hamburger menu in the upper-right corner.
  2. Choose Add-ons. The Add-ons Manager tab opens.
  3. In the Add-ons Manager tab, select the Extensions panel.
  4. Select the Adobe Acrobat add-on you want to enable.
  5. Click the Enable button.
  6. Click Restart now if it pops up.

Disable Auto Open in Adobe Acrobat Reader

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Adobe Reader and Adobe Acrobat integrate with Internet Explorer so that PDF files automatically open in the web browser by default. Fortunately, you can disable auto-open in Adobe Acrobat and Adobe Reader to prevent PDFs from opening in your browser.

Instructions in this article apply to Adobe Acrobat Reader DC and Internet Explorer 8 and later.

How to Keep PDFs From Opening in a Browser

Follow these steps to prevent Adobe Acrobat Reader from opening PDFs within your web browser:

Open Adobe Acrobat Reader and select Edit > Preferences in the menu bar.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

You can also bring up the preferences menu with the keyboard shortcut Ctrl+K (or Command+K for Mac).

Select Internet in the left pane of the preferences window, then select Internet Settings.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Select the Programs tab.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Select Manage Add-Ons.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Select Adobe PDF Reader in the list of add-ons.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

If you don’t see Adobe PDF Reader listed, try selecting Run Without Permission from the Show drop-down menu.

Select Disable so that the PDF Reader won’t open PDFs in the browser.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Why You Should Disable Auto Open in Adobe Acrobat Reader

Attackers have exploited Adobe Reader’s confirmation-free rendering to spread malware. Turning off the Adobe Reader add-on for Internet Explorer helps you avoid accidentally downloading a computer virus via the internet.

Adobe Reader is really slow when it starts, no matter if you are loading only the program or have double-clicked on a pdf document that you want displayed in the application. It is certainly even slower if you load a pdf file into it, and maybe even more so if it is hosted remotely and not locally. Adobe Reader is slow which can be a very frustrating experience, especially if the pdf document that you try to load is not larger than a couple hundred Kilobytes.

The loading speed is one of the prime reasons why Adobe Reader users switch to third party programs promising faster speeds.

The reason why it is loading so slow is simple: Adobe Reader is loading plugins when it starts and this increases load times tremendously. Most users don’t need all of the plugins and that is what we are going to use to our advantage to speed up the software. Basically, we remove plugins that we do not need from being loaded at startup.

To do this browse to your plug_ins directory of your Adobe installation and move plugins into a newly created folder called optional.

The default directory for Adobe Reader 7 is for instance C:Program FilesAdobeAcrobat 7.0Readerplug_ins

Make sure you remove all plugins except the following ones: EWH32.api, print*.api, and Search*.api

Load a pdf afterwards and see how fast it loads and check if you miss a feature. If you do try to find out which plugin is needed for the feature and move it into the plug_ins folder again. The only option here is to use the name of the plugin to guess its functionality, or use trial and error to move one after another into the original folder until you have found the right plugin for the job.

Update: The Adobe Reader plugin directory has not really changed, other than the version number. The latest Adobe Reader plugin directory for instance is C:Program FilesAdobeReader 10.0Readerplug_ins where you find lots of plugins listed in.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

You can find out more about each plugin listed here by starting Adobe Reader and selecting Help > About Adobe Reader Plugins. Here you find the names of the plugins and their file names, as well as a short description of what it does.

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How to Make Adobe PDFs Load Faster in Mozilla Firefox

Audrey Goodwin

2020-09-08 10:47:30 • Filed to: PDF Knowledge • Proven solutions

PDF documents have increasingly become popular. A broad range of PDF document Readers have been developed but at times you may need to view PDF online using a browser. Many official documents often come in the PDF format and may pose a challenge especially when you have not installed a PDF Reader. Going online, Google PDF Viewer, for instance, can help open the document. There are a variety of ways, for example, using the Chrome PDF Viewer or the Firefox PDF Viewer can help you get what you need to be done. Google Drive PDF Viewer, i.e. PDF Viewer, Safari PDF Viewer are also helpful.

How to View PDF in Chrome, Firefox, Safari and IE

1. How to View PDF in Chrome PDF Viewer

This browser always comes with an inbuilt PDF viewer that enables users to open the documents with ease. Replacement of this viewer with Adobe Acrobat or Adobe Reader is possible by the user after disabling the inbuilt PDF viewer. The following are the steps you can follow to view PDF on Chrome:

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Step 1: Open the Chrome Browser

Step 2: Navigate to the “Plug-ins”. Select the PDF viewer from the list of options given and that’s “Chrome PDF Viewer”. You can now toggle the given option to enable the viewer. Click “Enable” to set Chrome PDF Viewer as the default PDF viewer on Google Chrome.

Step 3: Right click on your document. Navigate to the “Open With” option and choose “Chrome PDF Viewer” from the drop down menu. You can also drag a PDF document direct into the browser, and it will open. Using this above outline method, opening a PDF document becomes easy. You can view a downloaded document directly using this method.

2. How to Open and View PDF in Firefox PDF Viewer

Mozilla Firefox is one of the most common browsers in use on virtually every computer. The Firefox PDF Viewer depends on add-ons to accomplish this task. Here is how you can get the add-ons ready to read a PDF.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Step 1: Launch the Firefox browser. Navigate to the “Options” button and choose “Applications” on the top toolbar.

Step 2: You can find the option “Portable Document Format (PDF)” window. From the list shows up, select “Preview in Firefox”.

Step 3: You can now select a file, right-click and choose Firefox from the option of “Open With”. Your document is now open.

3. How to Read PDF in IE (Internet Explorer)

Among the oldest browsers in use is the internet explorer. The IE PDF Viewer utilizes the Adobe Reader, Adobe Acrobat or Foxit Reader add-ons. Activating the add-ons through the following steps can help you get started on viewing your documents on the browser.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Step 1: Open the Internet Explorer.

Step 2: Click on Tools and then select “Manage Add-ons”.

Step 3: When window on add-on types appears choose toolbars and extensions. Choose the option of all add-ons and then select “Adobe PDF Reader” from the list of add-ons. Select and click the “Enable” button.

Following these simple steps will land you on your document and then you can choose the option of making it a default program in case you always want to open PDF documents using IE.

4. How to Read PDF in Safari

At times it may be challenging when the Adobe Reader you have installed is not the latest. You can install the latest Reader that will automatically integrate its plugin into Safari. The Safari PDF Viewer can be activated through the following steps:

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Step 1: Open the Safari browser.

Step 2: Click on the “Preferences”. From the new window that pops up, you can select security before selecting website settings. A list of available plugins appears and you can choose the “Always Allow” option on Adobe Reader plugin.

Step 3: When these steps are done, the plugin will always be running and so allow you to view your documents using the browser when you want to. Besides the one time use you can make the opening direct by making Safari your default program for PDF.

How to View PDF Offline with the Best PDF Viewer

The convenience of reading PDF documents offline is not comparable to any other method. Viewing PDF in a browser may not give as many features as when one uses programs like PDFelement. The broad range of features it offers is unbeatable, combining all the features provided by every other reader into one package. The great interface makes it user-friendly and unique. As an open source software it gives millions access to quality PDF reading.

Right from the text interface that allows one to focus on the content while highlighting, adding links, bookmarking and inserting headers and footers to the editing of the images, texts, and pages, Wondershare PDFelement is in a class of its own. Any text document is convertible to PDF and back. The OCR feature allows for the creation of searchable document from the scanned documents.

To Open, View and Edit a PDF document use the following steps:

Step 1: Open PDF

Launch the Wondershare PDFelement application. Click “Open” on the home window and select the file you want to view and click “Open” again.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Step 2: View PDF with 5 Modes

For better PDF reading experience, you can go to the “View” tab and choose from the five reading modes (single, continuous, facing and facing continuous, full screen) from the top menu.

Clicking on “Zoom in” and “Zoom out” will help you adjust the reading size of the PDF file.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Step 3: Make Comments when Reading PDF

Click on “Comment” button and start make annotations on the text and other elements of the open PDF.

You can add “Note”, “Stamps”, “Bookmarks” to the PDF when you are reading.

With over 80% of non-HTML documents on the web consisting of PDF documents, viewing PDFs in browsers has become a common user behavior among web surfers. You can come across anything in the PDF format: manuals, quick start guides, white papers, ebooks—the list goes on.

So it’s not surprising that browsers are trying to fill that need with built-in PDF viewing features. We’ve already covered Chrome’s native PDF viewer when it first came out. And other browsers, like Mozilla Firefox, have since followed suit.

Thus, it’s high time we took a look at how you can use Firefox’s PDF viewing feature that was added in the latest version of Mozilla Firefox.

Getting Started

The convenience of these built-in PDF viewers like Firefox’s is that it allows users to open and view PDF files online without a plug-in. The viewer is on by default, so you don’t have to worry about enabling it. All you have to do is click on the link of the PDF file. And just like that, you can view PDFs directly within the browser.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Overall, the interface is sleek and simple, and the minimalist approach offers a clean PDF viewing experience. Although Firefox PDF viewer worked well with the PDFs tested, it gave us a warning that “this PDF document might not be displayed correctly” and offers up a quick click solution to use a different viewer.

Depending on the complexity of the PDF you’re trying to view, you might want to take advantage of this. Otherwise, you can close this pop-up and continue to view your PDF.

PDF Viewing And Functionality

Once you have a PDF opened in Firefox, you can accomplish the most common tasks with the file from the toolbar.

Thumbnails: Navigate through the PDF with the built-in viewer’s sidebar navigation. You can toggle between a thumbnail or outline view

Page Up/Down: In addition to scrolling, you can manually go page by page through your PDF

Page Navigation: Jump to and from a specific page in the file

Zooming: For zooming in and out on your PDF content. Click on the drop down box and you can specify the page size and display

And like most PDF viewers, you get features to help you take that file offline or view it more easily:

  • Full Screen Mode: View your PDF document in full screen mode
  • Printing: Print a copy of the PDF. From the Print dialog you can select the printer drive, the range of pages and the number of copies you want
  • Downloading: Download and save the PDF to your computer
  • Copy Current View: Allows you to open the current view in another tab or window

Dealing With PDF Viewing Issues

Considering this feature is only a few months old, you may experience some bugs, slow rendering, or even blank PDF pages. As such, you may want to use Firefox’s built-in PDF viewer sparingly or only on more simple PDF files.

You can also disable the viewer and resort to using your regular PDF plugins or PDF viewers to open PDF files. To do this, follow these steps:

1. In the Tools menu, select Options

2. In the Options dialog, go into the Applications tab

3. Search for and select Portable Document Format (PDF) in the Content Type list

4. In the Action list, click on the drop-down arrow. Here you can specify how you want Firefox to handle PDF files.

The Firefox web browser was first released in beta on September 23, 2002, as the “Mozilla Browser,” although it was internally code-named “Phoenix.” Firefox 1.0 was officially released on November 9, 2004.

Firefox became a popular alternative to Microsoft Internet Explorer 6.0 when users sought a browser that could better protect them from spyware and malicious websites. As of 2017, it is the fourth-most popular browser after Google Chrome, Apple Safari, and UC Browser.


Firefox features tabbed browsing with individual processes per tab, popup blocking, private browsing, phishing detection, and a sandbox security model.

Firefox Quantum

On November 14, 2017, Mozilla announced Firefox Quantum, a new technology base for the Firefox browser. Every new version of Firefox for desktop computers uses Firefox Quantum technology, beginning with version 57. Mobile versions use the new appearance features (code-named “Photon UI”), but not the underlying technology.

Firefox Quantum is roughly twice as fast as previous versions of Firefox and uses less RAM when browsing. Large portions of Firefox Quantum were re-written using Mozilla’s home-grown system programming language, Rust, which provides enhanced thread safety. As a result, Firefox takes greater advantage of multiprocessing capabilities on the user’s computer.

How to get Firefox

Firefox can be downloaded from the official Firefox website. Downloads are available for the Windows, macOS X, Linux, iOS, and Android operating systems.

Adobe Acrobat online services let you compress PDF files right from your browser. Use our PDF compression tool to make your large PDFs smaller so they’re easier to share.

Easy PDF file compression

Drag and drop or upload a PDF document to let Acrobat reduce its size. After compressing the file, you’ll find it’s simpler to work with and store.

The best PDF compressor

Adobe invented the PDF format. Try the highest quality optimize PDF online tool to reduce the size of your PDF files in seconds.

How to reduce the size of a PDF online

Follow these easy steps to compress large PDF files online:

Click the Select a file button above, or drag & drop files into the drop zone.

Select the file you want to make smaller.

After uploading, Acrobat automatically reduces the PDF file size.

Sign in to download or share your compressed PDF.

How do I compress a PDF without losing quality?

How do I compress a PDF without losing quality?

The Acrobat online PDF compression tool balances an optimized file size against the expected quality of images, fonts, and other file content. Just drag and drop a PDF into the tool above and let Acrobat reduce the file size without compromising quality.

For more refined control of optimization settings, you can try Adobe Acrobat Pro DC for free for seven days. Acrobat Pro DC lets you customize PPI settings for color, grayscale, and monochrome images.

Mozilla Firefox and Google Chrome ship with built-in pdf reader applications that will display documents in the browser when you click on them.

While some may like that as it may be convenient for them, others may prefer to use a different program for that or download the files directly to their computer system to load it in a desktop program instead or have it there for safekeeping.

It is possible to download pdf documents directly in both browsers or configure the browsers to use third-party plugins to handle pdfs.

Just right-click on the file link and select the save option here, but if you want that to be triggered on a left-click as well, you need to modify how pdf files are handled by the browser.

How to disable Chrome’s pdf reader

How to Make Adobe PDFs Load Faster in Mozilla Firefox

It is pretty simply to disable Google Chrome’s native pdf reader.

  1. Type chrome://plugins in the browser’s address bar and hit the enter key on your keyboard afterwards.
  2. This displays all third-party and native plugins currently installed in the browser as well as their state.
  3. Locate Chrome PDF Viewer and click on the disable link to turn it off.

When you click on a pdf document afterwards, it will automatically be downloaded instead of displayed.

Note : If you have installed another plugin or extension that acts as a reader for pdf documents, then it will be used.

Additional information

Turn off PDF reader in Firefox

Firefox users have multiple options in this regard. The first uses the browser’s applications menu to set a different action for pdf file types.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

  1. Tap on the Alt-key on your keyboard and select Tools > Options from the menu bar that opens up.
  2. Switch to Applications and filter by pdf using the search at the top.
  3. There are three main actions available: always ask displays a prompt that provides you with options to select the action for every pdf document you click on in Firefox. Save file will automatically download the pdf file to the system, while Use application will use the selected program to display the document instead.

To disable the internal pdf reader, select always ask or save file. If you want to use another pdf reader, select the program instead.

There is a second option available, and it involves editing Firefox’s advanced configuration.

Updated January 10, 2017, 4:30pm EDT

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Getting a good PDF viewer is easier than ever. Modern web browsers like Google Chrome, Mozilla Firefox, and Microsoft Edge can all read PDFs out of the box, so you may not even need one. But if you want a separate PDF viewer, perhaps for the advanced PDF features some documents require, we have some options.

Google Chrome, Mozilla Firefox, or Microsoft Edge: Your Browser Handles the Basics

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Modern web browsers come with integrated PDF readers. You don’t even need to install a separate PDF viewer anymore. Browser PDF readers work well, offering a speedy experience without additional load times and clutter. And, since your browser updates its integrated PDF reader automatically, it’s always up-to-date with the latest security fixes.

Google Chrome, Mozilla Firefox, and Microsoft Edge all come with integrated PDF readers. When you find a PDF on the web, click it and it will open directly in your web browser. PDFs are treated just like other web pages. When you’re done, you can just hit the back button and keep browsing.

You can make PDF files on your hard drive open in your preferred web browser, too. For example, let’s say you want to open PDF files in Chrome. Just locate a .PDF file on your computer, right-click it, and select Open With > Choose Another App.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Select Google Chrome, Mozilla Firefox, or Microsoft Edge in the list, check the “Always use this app to open .pdf files” option, and click “OK”. The browser you chose will become your default PDF reader and will be used when you double-click a PDF file.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

If you don’t see your preferred browser here, scroll down in the list, select More Apps > Look For Another App on This PC, and point Windows at the browser’s .exe file in your Program Files folder.

Sumatra PDF: A Speedy, Lightweight PDF Viewer Outside Your Browser

How to Make Adobe PDFs Load Faster in Mozilla Firefox

If you do want a separate PDF reading program, we recommend Sumatra PDF. Sumatra is an open-source PDF viewer that also has support for other types of documents, including ePub and Mobi eBooks, XPS documents, and CBZ and CBR comic books.

Sumatra PDF is small, lightweight, and fast. It works entirely outside your browser, so PDFs will open in a separate window. It’s even available as a portable application, so you can take it with you and use it on any PC, even if you can’t install software on that PC.

There’s no real advantage to using this application over your web browser unless you just like having a separate application. It should work just as well as your browser, with no big additional features. But, if you’d rather see PDFs in a separate window, Sumatra PDF is your best bet.

Adobe Acrobat Reader DC: Slower, But Supports Advanced PDF Features

How to Make Adobe PDFs Load Faster in Mozilla Firefox

We recommend you stick with your web browser or a lightweight PDF reader like Sumatra PDF most of the time. Most PDF documents you’ll come across are not complicated, and they work very well—and very quickly—in these simplified PDF readers.

But, every now and then, you may come across a PDF document that needs additional features. For example, we’ve seen official government PDFs that include complex, scripted fillable forms that don’t work in the average PDF viewer. PDF documents can also contain 3D models and other rich media objects, and those just won’t work in your browser or Sumatra.

If you come across a PDF that doesn’t work properly in your typical PDF reader, we recommend Adobe’s official Adobe Acrobat Reader DC application. It’s unnecessarily heavy compared to lightweight PDF alternatives, but it will be able to handle all the obscure PDF features you’re likely to encounter. If you find yourself needing to open PDFs that require advanced features regularly, you should probably just stick with Adobe Acrobat Reader DC as your main PDF viewer, as much as it pains us to say.

Adobe Acrobat Reader has historically had regular security holes, likely due to all the additional features it needs to support. Modern versions of Adobe Acrobat Reader DC are automatically kept up-to-date with the latest security patches. Don’t worry about enabling automatic updates—automatic updates are enabled by default, and you can’t normally disable them.

Warning: The latest versions of Adobe Acrobat reader automatically prompt you to install a Chrome extension that reports information about your web browsing to Adobe. When you’re prompted to install an Adobe Acrobat extension in Chrome, click “Remove from Chrome”. There’s no good reason to activate this extension.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Mozilla has decided that Firefox Send, its encrypted file transferring service, won’t be returning. The reason for this decision is the same reason that compelled Mozilla to take the service offline in recent months: some users were taking advantage of Send to ship around malware and phishing attacks. In addition, Mozilla has also made a big announcement about its Firefox Notes product.

In March 2019, Mozilla introduced a new product called Firefox Send that enabled users to send files to other people. The service offered multiple benefits, including encryption and control over how many times the content could be downloaded. The feature joined several other similar popular offerings like WeTransfer and Hightail.

Despite its popularity, Mozilla took Firefox Send offline earlier this summer to address issues related to malicious use of the platform. The company says that in the time the service has been offline, it evaluated the product and its overall portfolio and focus. Based on that evaluation, Firefox Send will not be returning.

This same evaluation will also result in Mozilla dropping support for its Firefox Notes feature. This product, which is described as an ‘experiment,’ became a utility on Firefox and Android, enabling users to create secure notes that could be synced between the desktop browser and one’s Android mobile device.

In this case, Mozilla says that it will ‘decommission’ the Android Notes app and the syncing service in early November. However, the Firefox Notes browser extension for desktop users will remain available for those who have already installed it. Users will be given an option to export all of their notes — but, mind, Mozilla says it will no longer maintain this feature.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Audrey Goodwin

2020-09-08 10:34:28 • Filed to: PDF Software Comparison • Proven solutions

Adobe В® Acrobat В® Reader DC is a popular and leading PDF tool that has been trusted by users across the world for many years to view and edit PDF files. It’s especially known for its browser integration, which helps users access their PDF files from their browsers instead of launching Adobe Reader.

In this article, we’ll cover how to download and install the Adobe Reader plugin on different browsers to help you access your PDF files from your browser. Note that most browsers include native PDF plugins for viewing PDFs, though these lack many of the features that come with a standalone PDF application. Before introducing the Adobe Reader plugin, we’d like to recommend a simple alternative program.

A Simpler Alternative to Adobe Reader

PDFelement is a simple yet robust alternative to Adobe Reader. A PDF reader at first glance, PDFelement also offers multiple other features that give you full control over your PDF documents.

Apart from PDF editing, viewing, and printing, PDFelement enables you to compress, convert, combine, and create PDF files – functions that are not found on all types of software. There are virtually no limits to the types of documents the application can handle, providing support for Office documents, web pages, image files, EPUB files, and a multitude of other file types. After installing PDFelement, a PDFelement plugin will also be installed to your Microsoft Office programs, which allows you to create PDF from office documents directly. Check here to get more solutions to make PDF files.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Browser integration with Adobe Reader may get a little more challenging in 2017, with Firefox announcing they will stop support for NPAPI plugins. This and other issues surrounding the use of Adobe Reader means users will be looking for alternative PDF tools to handle their PDF files instead.

PDFelement lets users create and fill forms and manipulate scanned documents, thanks to the OCR (Optical Character Recognition) feature. It also gives you the power to merge and split PDF files, insert and replace PDF pages, and extract content from PDF files. It further enables you to insert and edit annotations, add bates numbers, hyperlinks, bookmarks, watermarks, passwords, digital signatures, footers, headers, and redaction for sensitive documents.

PDFelement helps you save time by enabling you to work on multiple documents at the same time. Its UI is simple enough for beginners to learn, with all the features conveniently located in an easy-to-use application window.

Adobe Reader Plugin Download in Different Browsers

1. Adobe Reader Plugin Chrome

Like many other browsers, Google Chrome comes with its own PDF plugin for viewing and printing PDF files. To install the Adobe Reader plugin instead, you will have to deactivate Chrome’s native PDF reader. To do this, follow this procedure:

How to Make Adobe PDFs Load Faster in Mozilla Firefox

  • If you haven’t installed Adobe Reader, download and install it onto your computer.
  • Launch Google Chrome, and type “chrome://plugins/” into the address bar, Hit enter to launch the plugins settings tab.
  • In the list of plugins, you should be able to see Reader or Adobe Acrobat. Click “Enable” to activate it.
  • Note that if you don’t see Adobe in this list, then your updated version of Chrome doesn’t support Adobe Reader since Chrome doesn’t support NPAPI plugins.
  • Restart Chrome.

2. Adobe Reader Plugin Firefox

Like Chrome, Firefox uses its own inbuilt PDF viewer for PDF files as well. To make Adobe Reader the default PDF viewer on Firefox, you have to overwrite the default PDF settings. Follow these steps to do so:

How to Make Adobe PDFs Load Faster in Mozilla Firefox

  • Download and install Adobe Reader if you don’t have it installed. Make sure the application is updated after installation.
  • Open Firefox, click the menu button on the Firefox window and select “Options.” On the options list, click “Applications.” Here, type the words “PDF” in the search bar to bring up the options for PDF files. On the drop down menu next to the “Portable Document Format,” select “Use Adobe Acrobat (in Firefox).”
  • Close the options window and refresh Firefox.

3. Adobe Reader Plugin IE

For Internet Explorer, activating the Adobe Reader plugin will depend on the version of Internet Explore you are using. Follow these steps to activate the plugin for your version of Internet Explorer.

  • Launch Internet Explorer and click on “Tools”. Then select “Manage Add-ons”. For some versions of Internet Explorer, you can access the add-on management module by navigating to Tools > Internet Options > Programs tab > Manage Add-ons.
  • Here, choose “All Add-ons” in the pop-up submenu.
  • Scroll down until you see the add-ons section for Adobe systems. Choose Adobe PDF Reader.
  • Click “Enable” to enable Adobe Reader integration.

4. Adobe Reader Plugin Safari

Safari also has its own native PDF viewer that comes with macOS. You can download and install the Adobe Reader plugin for your Safari browser to change the default PDF viewing tool to Adobe Reader. Note that to you need ver10.5.8 and ver10.6.4 of macOS X if you are running on Safari 4 and macOS X ver10.6.4 for Safari.

The Acrolaw Blog is a resource for lawyers, law firms, paralegals, legal IT pros and anyone interested in the use of Acrobat in the legal community. Rick Borstein, blog author, is a Principal Solutions Consultant with Adobe Systems Incorporated.

How do I open a PDF in Acrobat instead of the browser?

By default, PDF files opened from a web page display inside the browser window with a limited toolbar:

How to Make Adobe PDFs Load Faster in Mozilla Firefox

The default behavior does not suit the needs of all legal users. Some eFiling sites require running in the browser, but other applications require opening the PDF directly in Acrobat.

It is easy to change the way that Acrobat opens files from the browser by modifying Preferences.

Read on to learn how to change Preferences.

I’ll also tell you about a very useful Firefox extension that let’s you choose— on the fly— whether you would like a PDF to open in the browser or in Acrobat.

An Easy Preferences Change

To change the default PDF open behavior when using a web browser:

  1. Choose Edit—>Preferences
  2. Select the Internet category from the list on the left
  3. To display the PDF in the browser, check “Display in browser”
    To open PDFs from the web directly in Acrobat, uncheck “Display in browser:
    How to Make Adobe PDFs Load Faster in Mozilla Firefox

A More Flexible Approach using Firefox

Mozilla Firefox, a free, Open Source web browser, is becoming increasingly popular in the legal community. Some legal users feel it is more secure than Internet Explorer. When you install Firefox, all of your existing bookmarks are imported.

One compelling reason to switch to Firefox is the great number of free extensions which can add useful features to the application.

The PDF Download extension is a free add-in that offers the user the choice of opening the PDF in the browser or in Acrobat.

To install the extension, open Firefox and go the PDF Download page.

Using PDF Download

Using the PDF Download extension is simple.

When a link to a PDF is clicked, the window below will appear:

The first two options on the left give users the flexibility they need to download the PDF or open it in the browser.

PDF Download Preferences

With a bit more work, you can change PDF Download to meet your particular needs.

  1. Go to Tools—PDF Download Options
    How to Make Adobe PDFs Load Faster in Mozilla Firefox
  2. Instead of the pop-up option window, you can set a different behavior. This is useful when you know you will need to open several PDFs outside the browser:
    How to Make Adobe PDFs Load Faster in Mozilla Firefox

Although PDF Download offers PDF to HTML conversion, I found this feature slow and inaccurate for many documents.

What about Download Options for Internet Explorer?

From what I understand, IE does not offer a flexible enough programming interface to allow this kind of customization.

If you know differently, let me know!

3 Responses to How do I open a PDF in Acrobat instead of the browser?

When i opened (in Acrobat 11) prefrences then internet ther was no “display PDF in browser” item

Expert Michael Cobb examines Mozilla’s Firefox PDF reader and discusses whether it is more secure than Adobe Reader.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

Mozilla included a built-in PDF reader as a default feature in Firefox 19. How does it work, and is it safer than.

Continue Reading This Article

Enjoy this article as well as all of our content, including E-Guides, news, tips and more.

other PDF readers like Adobe Reader or Foxit?

Ask the Expert! expert Michael Cobb is standing by to answer your questions about enterprise application security and platform security. Submit your question via email. (All questions are anonymous.)

Mozilla’s PDF reader has been part of Firefox for several versions, but it had to be manually enabled prior to version 19. The Firefox PDF reader was switched on by default for the first time in the Firefox 18 beta and fully integrated as the default PDF reader in version 19. As a result, Windows, Mac and Linux users no longer need to rely on plugins to view PDFs. The PDF reader loads and renders PDFs directly in the browser by using PDF.js, a JavaScript library that converts PDF files into HTML5 using standard HTML5 APIs.

Mozilla introduced a built-in PDF reader, in part, to reduce the need for plugins with proprietary source code that, according to Mozilla, “could potentially expose users to security vulnerabilities.” Another initiative to tackle plugin security issues is its Click-to-Play feature. By default Click-to-Play restricts all browser plugins, except the latest version of Flash, from loading until a user gives it permission.

Adobe Reader has been widely exploited over the last few years. Most PDF exploits, including recent zero-day exploits, have taken advantage of vulnerabilities in Adobe Reader’s rendering engine rather than its parsing engine. (Adobe probably realized some time ago that malformed structures and content would cause problems so concentrated on hardening the parsing engine.) Mozilla’s approach is to take the structure of the PDF and translate it into a DOM structure, which can then be rendered by the browser’s standard HTML renderer and interacted with via JavaScript. This removes a large portion of the attack surface, leaving only the security of the document translation engine as an attack vector. If a PDF files contains an exploit for Adobe Reader, opening the file using pdf.js will prevent the exploit from working.

Any real exploitable flaws in Mozilla’s viewer are likely to be reliant on a secondary one that could be exploited through other means, such as a bug in the HTML5 renderer or JavaScript interpreter. To obtain an arbitrary code execution exploit out of JavaScript, you have to find a hole in the JavaScript engine itself, as errors in scripts written in JavaScript lead only to an exception.

Mozilla’s reader is certainly faster than a plugin reader, as the user doesn’t have to download the content to read it in Foxit or Adobe Reader, or fire up a plugin. It also means less reliance on Adobe for security updates, which is a good thing! However, be forewarned that some PDFs don’t display properly or at all. You may want to look at the integrated document reader in Windows 8, Modern Reader, as another alternative. Users running Linux have even more choices when it comes to free PDF viewers, some of which can handle other document formats.

Introduction to Firefox Debugger

Are you only using console.log to debug your JavaScript code? It is OK to admit. Using console.log is easy and convenient, but it has limitations. It isn’t great for catching things as they happen, or diving deep into code to see exactly where it is broken. To do that, you’ll need a full-featured debugger. The Firefox Debugger has comprehensive tools to evaluate and repair broken code. Once you learn the basics, you’ll find that using a debugger is not only fast and easy, but it can save you from hours of frustration, and potential ‘bang-head-on-desk’ sessions.

We’ll learn the basics of Firefox Debugger by debugging a simple to-do app. You will need Firefox to follow along. Don’t have Firefox? Check out Firefox Developer Edition .

Before diving in, let’s take a look at the Debugger interface. Hit option + command + S on Mac or shift + ctrl + S on Windows to open the Debugger.

The Debugger is divided into three panes:

  • The source list pane shows all the JavaScript files related to the current page or project.
  • The source pane shows the content of those files.
  • The tool pane contains info and tools.

The tool pane can be broken down into five sections:

  • The toolbar has buttons that control the debugger’s movement through the script.
  • The watch expressions section allows us to watch expressions as executions are paused.
  • The breakpoints section displays all of the breakpoints that have been set. Next to each breakpoint is a checkbox to enable or disable that breakpoint.
  • The call stack section displays each level of the call stack, as well as the function name, filename, and line number.
  • The scopes section displays all objects that are in scope.

Don’t worry if you don’t understand what all of these terms and symbols mean. We’ll cover them in the following sections. Just take note of where things are so that you can follow along.

Now that we’ve reviewed the Debugger interface, let’s use it to fix a broken to-do app.

Firefox DevTools: Hot Tip

Sometimes JavaScript code will be “minified” so that the file size is smaller and faster to load. This is great for your users, but it can make the code impossible to read in the Debugger. Thankfully, Firefox has a great option for viewing minified code. When you view a minified file in the source pane, an icon will appear at the bottom. After clicking this icon, Debugger will format the code into something that is human-readable, and display it as a new file in the source pane.

Give it a try! The link below will bring you to a to-do app that is using a minified JavaScript file. Simply:

By default, when you click a PDF file in Google Chrome browser, it opens the PDF file in the browser itself. It doesn’t download the PDF file or open in the default Adobe reader. If you are happy with this default setup, then you can skip any further settings. But if you need the browser to download the PDF file once you click on it and open in Adobe reader instead of Chrome browser, you can follow the below steps.

You may need to download the PDF file and open in Adobe reader to get more options and features which the acrobat reader has. For example, fill the forms, annotations, sign or any other options which Google Chrome doesn’t have.

How are we going to do?

  • Changing the settings will download every PDF file you click in Chrome browser. You need to think twice whether you need this setup. At the moment once it opens in Chrome browser it has more options to save it locally and print.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

  • There is a plugin/extension we are going to discuss, which can sense the PDF file in Chrome browser and allow to open in local Adobe reader instead of downloading to your ‘Downloads’ folder.
  • If the Adobe reader is not set as the default PDF handler, then we need to fix that also.

Download PDF files Instead of Opening in Chrome Browser

1) When we click a PDF file, it opens like below.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

2) To download the file without opening it in first instead, go to the settings of Chrome browser (Clicking 3 dots) and Settings.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

3) Scroll down and expand the ‘Advanced’ settings. Under ‘Privacy and security’ click on ‘Site Settings’. I’m demonstrating these steps on the latest Chrome browser (ver – 74.0.3729). If you have the older version, you may find the final option in a different place.

4) Select ‘PDF documents’ here.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

5) Enable this option to download PDF files without opening in Google Chrome. This will download the all PDF files you click to your default download location.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

6) After the change, now the same PDF file downloaded to my computer without opening in the browser as shown below.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

7) Clicking the file should open it in Adobe Acrobat reader. Hopefully, you already have Adobe Acrobat reader installed and set as default PDF file handler. If it is not opening in Adobe reader, then the Adobe reader is not set as the default app/program to open PDF files on your computer.

Open PDF file in Adobe Reader without Opening in Chrome – Using Plugin

To make this work, you should not enable the feature to download the PDF file we did in step 5. Once it is enabled, this method will not work.

8) Visit Chrome web store in your Chrome browser, and search for ‘Adobe Acrobat’ and add to chrome as an extension. You will see the Acrobat icon once it is added successfully.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

9) With this plugin in, when we click a PDF file, as usual, it will open in the Chrome browser. But we have another option with this plugin to open in Acrobat reader.

How to Make Adobe PDFs Load Faster in Mozilla Firefox

The plugin senses the PDF file and gives the option to open in Acrobat reader. Once you click that it will be opened in the local Acrobat reader without downloading to the local computer.

This method helps to view the PDF file in Chrome first, then open in Acrobat reader to annotate, fill or sign the PDF files.

Google Chrome not opening PDF files, but Downloading them

This could be another scenario you might face. Some users do not want to download and open it in local Adobe reader, instead, they want to see the PDF files in Chrome browser only. Later they will decide to download or discard. This is the default behavior of Chrome.

If any changes happened and you need to put back the default option to not download PDF files in Google Chrome by clicking, visit step 5 and disable download option of PDF files under Chrome settings.


  • 1 What is Ubiquity?
  • 2 Install
    • 2.1 For Firefox 14.0 and up
    • 2.2 For Older Versions of Firefox
  • 3 Participation
  • 4 Meetings
  • 5 Documentation
  • 6 Blogs
  • 7 Twitter
  • 8 The Herd
  • 9 Proposals
  • 10 Internationalization and Localization
  • 11 Release Notes

Ubiquity was a Mozilla Labs experiment that was in development from 2008 to 2009. Its purpose was to explore whether a radically different type of interface to the Web — a task-centric, natural-language-based command line — could help us get common Web tasks done faster.

Development is currently on indefinite hiatus. We will most likely revisit the experiment at some point in the future. In the meantime, the Ubiquity extension for Firefox is still available for download (see below). Also, some of the ideas from Ubiquity are being implemented in Jetpack.

You can learn more about Ubiquity by reading Atul’s blog post entitled Ubiquitous Interfaces, Ubiquitous Functionality, or try it out via the User Tutorial.

Other informative blog posts about Ubiquity include:

For Firefox 14.0 and up

Install the latest beta of Ubiquity – Maintained by community member Satyr

For Older Versions of Firefox

  1. General Google Group/mailing list – Useful for discussion of command development, user interface, feature suggestions, and other high-level discussions.
  2. Core Google Group/mailing list – Discussion of low-level internals of Ubiquity.
  3. Get Satisfaction – Ideas, Complaints, Forum, and “Customer Service”
  4. #ubiquity – Live internet relay chat discussion.
  5. Good-for-beginners bugs – bug tickets which may be good for a Ubiquity beginner to attack
  6. Frequently Encountered Bugs – bugs that get reported a lot on the mailing list and Get Satisfaction that would make lots of people happy if they got fixed
  7. Commands In The Wild Add links to your commands here.
  8. Issue Tracker – Used to report/discuss bugs and submit patches for Ubiquity.
  9. Trac Components and Keywords – Keywords and categories to use when filing Trac tickets.
  10. Ubiquity HG Repository – The Mercurial source code repository for Ubiquity.
  11. Buildbot – Continuous integration that runs Ubiquity unit tests after every commit. If the tests fail, they’re reported immediately to the mailing list.
  12. Credits
  1. Ubiquity User Tutorial
  2. The latest Command Authoring Tutorial (for command authors using a Ubiquity source checkout); or the frozen Ubiquity 0.5 Command Authoring Tutorial for those using version 0.5 of the extension.
  3. Command Update Tutorial for how to take a command written for Ubiquity 0.1 and make it work in Ubiquity 0.5.
  4. Locked-Down Feed Tutorial
  5. Secure Coding Practices
  6. Skinning Ubiquity Tutorial
  7. Ubiquity Code Documentation – Generated from the latest source code via Code Illuminated.
  8. Contributing to Core Development
  9. Localizing Ubiquity to Your Language
  10. Localizing Commands to Your Language
  11. Noun-types Reference
  12. Bundled libraries
  13. Using jQuery in Ubiquity
  14. JavaScript style guide
  15. Ubiquity 0.1.3 Architecture
  16. Labs/Ubiquity/Parser_Documentation
  17. Labs/Ubiquity/Parser_Interface
  18. Help Document the 0.5 code here – working copies of the wiki documentation for the latest source version
  19. Help us improve the built-in command documentation by editing this page
  20. Help us improve the interactive tutorial by editing this page
  1. Planet Ubiquity
  2. Aza
  3. Atul
  4. Rey
  5. Jono
  6. Abi
  7. Zach
  8. mitcho (see also his future topics to blog on)
  9. cers
  1. @mozillaubiquity: The main source of news & info about the Ubiquity project via Twitter. Be sure to follow.
  2. @azaaza: Mozilla’s co-lead developer for the Ubiquity project
  3. @toolness: Mozilla’s co-lead developer for the Ubiquity project
  4. @reybango: Evangelist for the Ubiquity project
  5. @theunfocused: Fellow Mozillian Blair McBride
  6. @_abi_: Created the Devo Firefox extension which provided a keyboard command launcher similar to what Ubiquity is today.
  7. @fernando_takai: Major supporter of Ubiquity.
  8. @mitchoyoshitaka: Resident linguist
  9. @bpung: Mozilla labs intern, developer for Ubiquity
  10. @ChristianSonne: Developer for Ubiquity

The Herd keeps track of all Ubiquity scripts. For more information, see the following links:

  1. Herd HG Repository
  2. Herd Developer FAQ
  3. CouchDB – database used for Herd
  4. The Herd-The Herd Itself.