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How to use firefox’s built-in task manager

How to use firefox’s built-in task manager

If you’re having trouble with sluggish system performance while browsing the web with Mozilla Firefox, you can use Firefox’s built-in Task Manager tool to quickly identify system resource usage and manage long lists of tabs. Here’s how to use it.

First, if you already have Firefox open, leave your tabs as they are. Otherwise, open Firefox and load some commonly visited websites in multiple tabs that you can use as examples to check out in Task Manager.

In any Firefox window, click the hamburger icon (three horizontal lines) in the upper-right corner of the window and select More > Task Manager.

How to use firefox’s built-in task manager

When the Task Manager tab pops up, you’ll see a list of open tabs, each one corresponding to a website you’re browsing. At any time, you can click the “Memory” or “Energy Impact” column header to sort the tabs from greatest to least resource usage.

How to use firefox’s built-in task manager

To see the CPU processing power usage of each tab, examine the “Energy Impact” column. You’ll see labels such as “Low,” “Medium,” and “High,” along with numbers that measure relative energy impact (higher numbers mean more energy usage). Tabs with higher energy impact will reduce the CPU performance of your computer, use more electrical power, and drain the battery of a portable machine faster.

How to use firefox’s built-in task manager

To see how much RAM each tab is using, examine the “Memory” column. You’ll usually see the memory usage listed in megabytes (MB), but a gigabyte reading is possible. If you see any suspiciously high numbers here, it’s possible that particular site or tab is slowing down your machine.

How to use firefox’s built-in task manager

If you see a small black arrow beside any tab in the list, click it to see an expanded list of subframes and trackers in use. Some sites call upon external websites to provide extra functionality or to send data to advertisement networks, and those can use resources as well.

How to use firefox’s built-in task manager

After clicking the arrow, you might be surprised to see all of the trackers and subframes that some websites include in their code.

How to use firefox’s built-in task manager

And finally, if you want to close a troublesome tab, select it in the list, then click the “X” button on the far right side of the row.

How to use firefox’s built-in task manager

The tab will close. You can close as many tabs as you’d like this way, which can also be a handy quick way to manage a colossal list of open tabs. Good luck!

This feature is available on all desktop versions of Mozilla Firefox, including Firefox on Windows 10, macOS, and Linux.

@benjedwards
Oct 21, 2020, 9:00 am EST | 1 min read

How to use firefox’s built-in task manager

If you’re having trouble with sluggish system performance while browsing the web with Mozilla Firefox, you can use Firefox’s built-in Task Manager tool to quickly identify system resource usage and manage long lists of tabs. Here’s how to use it.

First, if you already have Firefox open, leave your tabs as they are. Otherwise, open Firefox and load some commonly visited websites in multiple tabs that you can use as examples to check out in Task Manager.

In any Firefox window, click the hamburger icon (three horizontal lines) in the upper-right corner of the window and select More > Task Manager.

How to use firefox’s built-in task manager

When the Task Manager tab pops up, you’ll see a list of open tabs, each one corresponding to a website you’re browsing. At any time, you can click the “Memory” or “Energy Impact” column header to sort the tabs from greatest to least resource usage.

How to use firefox’s built-in task manager

To see the CPU processing power usage of each tab, examine the “Energy Impact” column. You’ll see labels such as “Low,” “Medium,” and “High,” along with numbers that measure relative energy impact (higher numbers mean more energy usage). Tabs with higher energy impact will reduce the CPU performance of your computer, use more electrical power, and drain the battery of a portable machine faster.

How to use firefox’s built-in task manager

To see how much RAM each tab is using, examine the “Memory” column. You’ll usually see the memory usage listed in megabytes (MB), but a gigabyte reading is possible. If you see any suspiciously high numbers here, it’s possible that particular site or tab is slowing down your machine.

How to use firefox’s built-in task manager

If you see a small black arrow beside any tab in the list, click it to see an expanded list of subframes and trackers in use. Some sites call upon external websites to provide extra functionality or to send data to advertisement networks, and those can use resources as well.

How to use firefox’s built-in task manager

After clicking the arrow, you might be surprised to see all of the trackers and subframes that some websites include in their code.

How to use firefox’s built-in task manager

And finally, if you want to close a troublesome tab, select it in the list, then click the “X” button on the far right side of the row.

How to use firefox’s built-in task manager

The tab will close. You can close as many tabs as you’d like this way, which can also be a handy quick way to manage a colossal list of open tabs. Good luck!

This feature is available on all desktop versions of Mozilla Firefox, including Firefox on Windows 10, macOS, and Linux.

Last updated September 27, 2020 By Ankush Das 23 Comments

Firefox is popular among Linux users. It is the default web browser on several Linux distributions.

Among many other features, Firefox provides a task manager of its own.

Now, why would you use it when you have task manager in Linux in the form of system monitoring tools? There is a good reason for that.

Suppose your system is taking too much of RAM or CPU. If you use top or some other system resource monitoring tool like Glances, you’ll notice that these tools cannot distinguish the opened tabs or extensions.

Usually, each Firefox tab is displayed as Web Content. You can see that some Firefox process is causing the issue but that’s no way to accurately determine which tab or extension it is.

This is where you can use the Firefox task manager. Let me show you how!

Firefox Task Manager

With Firefox Task Manager, you will be able to list all the tabs, trackers, and add-ons consuming system resources.

How to use firefox’s built-in task manager

As you can see in the screenshot above, you get the name of the tab, the type (tab or add-on), the energy impact, and the memory consumed.

While everything is self-explanatory, the energy impact refers to the CPU usage and if you are using a Laptop, it is a good indicator to show you what will drain the battery quicker.

Access Task Manager in Firefox

Surprisingly, there is no Firefox keyboard shortcut for the task manager.

To quickly launch Firefox Task Manager, you can type “about:performance” in the address bar as shown in the screenshot below.

Alternatively, you can click on the menu icon and then head on to “More” options as shown in the screenshot below.

Next, you will find the option to select “Task Manager” — so just click on it.

How to use firefox’s built-in task manager

Using Firefox task manager

Once there, you can check for the resource usage, expand the tabs to see the trackers and its usage, and also choose to close the tabs right there as highlighted in the screenshot below.

How to use firefox’s built-in task manager

Here’s what you should know:

  • Energy impact means CPU consumption.
  • The subframes or the subtasks are usually the trackers/scripts associated with a tab that needs to run in the background.

With this task manager, you can spot a rogue script on a site as well whether it’s causing your browser to slow down.

This isn’t rocket-science but not many people are aware of Firefox task manager. Now that you know it, this should come in pretty handy, don’t you think?

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How to use firefox’s built-in task manager

Task MGR Shows 6 or more Firefox processes Running

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  • Last reply by jscher2000

How to use firefox’s built-in task manager

Ever since the “upgrade”, Firefox slows to a crawl after being open a few minutes. When I check Task Manager I find anywhere up to 10 FF processes running at the same time (1-2 tabs open) and the total memory being used can be up to 2 GB. If I close any of the processes then all of them close at the same time. Even as I write this the program will freeze the page for 15-30 seconds or more then suddenly release. I have to use Flash because many of the pages I need to visit daily still uses it and refuse to find any other way to program. I’d really like FF to work. I’d even be okay with the old problems but I might have to move to Chrome if FF stays this unstable.

Chosen solution

Also, please see the reply from philipp in this thread regarding accessibility services: Firefox 57 hangs up.

All Replies (6)

That seems like a lot of processes; I don’t really expect to see more than 4 or 5. You can adjust the number of content processes on the Options page to see whether that improves responsiveness. This article has the details: Firefox’s performance settings. Does that make any difference?

Chosen Solution

Also, please see the reply from philipp in this thread regarding accessibility services: Firefox 57 hangs up.

How to use firefox’s built-in task manager

i reduced the processes to 4. I was able to use the browser for a while but then froze again. I found four copies (with 1 tab open), one was 2.6 GB, one was 1.8 GB and the other 2 were right at 500 MB. I tried the thread you recommended and changed that setting so we’ll see how that goes.

How to use firefox’s built-in task manager

The last solution seems to have worked. I still have too many FF processes going on (dropped to 4 but still see 5 or 6). Nevertheless, it hasn’t frozen for the past few days so it seems to be working. Thank you for your time and happy holidays.

How to use firefox’s built-in task manager

There option to limit one process does not work with the new Firefox Quantum so you will have to use and older version of Firefox and then it may actually work.

This does not work in the newest version of Firefox and will NOT run only one process. I am a 35 year computer tech with a LOT of experience. Firefox will need to patch the new Firefox Quantum to allow this option to work.

There option to limit one process does not work with the new Firefox Quantum so you will have to use and older version of Firefox and then it may actually work.

The setting on the Options/Preferences page is for one to seven content process. There also will be a process for the UI.

My about:config lists these preferences and I currently have 6 total firefox.exe processes, five of which have -contentproc in their command line:

  • dom.ipc.processCount => 1 (default)
  • dom.ipc.processCount.extension => 1 (default)
  • dom.ipc.processCount.file => 1 (default)
  • dom.ipc.processCount.web => 4 (computed by Firefox?)
  • dom.ipc.processCount.webLargeAllocation => 10 (default)

There option to limit one process does not work with the new Firefox Quantum so you will have to use and older version of Firefox and then it may actually work.

If you’re experiencing slow performance while browsing the web with Microsoft Edge, you can use Edge’s built-in Browser Task Manager to identify which sites or extensions might be bogging down your system with heavy resource usage. Here’s how to use it.

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First, open “Microsoft Edge.” Click the ellipses button (three dots) in the upper-right corner of any Edge browser window. In the menu that pops up, select “More tools,” then “Browser task manager.”

How to use firefox’s built-in task manager

When the Browser Task Manager window opens, you’ll see a list of all tabs, processes, and extensions running in the browser. Data for each one is divided into four columns. Here’s what each column means:

  • Memory: This shows how much system memory a tab or process is using in kilobytes.
  • CPU: This shows what percentage of your total CPU capacity (processing power) a tab or process is using.
  • Network: This shows the amount of network bandwidth in use by the tab or process in bytes or kilobytes per second. Tabs with open sites that stream media like video or music will use more.
  • Process ID: This shows the process ID of the tab or process, which is mostly useful for in-depth developer troubleshooting

How to use firefox’s built-in task manager

At any time, you can click the “Memory,” “CPU,” or “Network” column header, Task Manager will sort the tabs and processes by resource usage.

For example, if you’d like to figure out which tab is using the most memory, click the “Memory” column header, and the most memory-intensive tabs will move to the top of the list. Likewise, if you want to see which tabs are using the most CPU power, click the “CPU” column header.

How to use firefox’s built-in task manager

If a tab or process is taking up too much CPU, memory, or network bandwidth and becomes unresponsive, you can force it to close using Edge’s Browser Task Manager. To do so, select the tab or process from the list, then click the “End process button.”

إذا كنت تعاني من بطئ النظام في جهازك الحاسوب في جميع الحالات فقد قمنا بشرح اهم خطوات حل مشكلة بطء ويندوز وتسريعه إلى افضل اداة، وإذا كنت تعاني من بطء متصفح كروم فقد قمنا أيضًا بشرح طريقة تسريع متصفح جوجل كروم، ولكن إذا كانت تواجه مشكلة في بطيء النظام أثناء استخدام متصفح موزيلا فاير فوكس Mozilla Firefox، فإن الحل يكمن في استخدام أداة مدير المهام (Task Manager) المدمجة في فاير فوكس، حتى تتمكن من تحديد وإدارة علامات التبويب التي تستهلك موارد النظام.

ما فائدة استخدام مدير المهام في فاير فوكس

تتيح لك ميزة مدير المهام في Firefox معرفة علامات التبويب أو الملحقات التي تستخدم قدرًا كبيرًا من الذاكرة أو الطاقة، بما في ذلك تلك التي تستهلك موارد النظام، بحيث يمكنك معرفة مقدار ذاكرة الوصول العشوائي (RAM) التي تستخدمها المهمة المحددة حاليًا على نظامك، بالإضافة إلى معرفة المهام ذات التأثير العالي على الطاقة أي التي تعمل على استنزاف البطارية بشكل أسرع مما قد يؤدي إلى إبطاء أداء نظامك.

كما أن ميزة مدير المهام في فاير فوكس متاحة بالفعل في جميع إصدارات سطح المكتب من Mozilla Firefox، بما في ذلك على أنظمة التشغيل ويندوز 10 و ماك و لينكس، حيث يمكنك تطبيق جميع الخطوات التالية على نظام تشغيل تستخدمه.

طريقة فتح مدير المهام في Firefox

  1. انقر فوق زر القائمة.
  2. انقر فوق المزيد(More).
  3. انقر فوق إدارة المهام (Task Manager).
  4. سيتم الآن فتح مدير المهام في علامة تبويب جديدة.

ملاحظة: يمكنك أيضًا كتابة about: performance في شريط العناوين لفتح صفحة إدارة المهام (Task Manager).

كيفية استخدام مدير المهام المدمج في Firefox

يمكنك استخدام مدير المهام المدمج في Firefox لتغلب على مشاكل فاير فوكس منها تلك التي تؤدي إلى بطئ النظام، أولاً، اترك جميع علامات التبويب المفتوحة كما هي، حتى تلك التي قد تؤدي إلى انهيار متصفح الفايرفوكس.

  • ثم انقر فوق زر القائمة> المزيد> إدارة المهام.
  • في علامة تبويب (إدارة المهام) المنبثقة، سترى قائمة بعلامات التبويب المفتوحة، كل منها باسم موقع الويب الذي تتصفحه.
  • انقر فوق تبويب القائمة (الذاكرة) Memory أو (الأثر على الطاقة) Energy Impact لفرز علامات التبويب الأكثر استخدامًا للموارد من الأكبر إلى الأقل.

عند فحص عمود (الذاكرة) فسوف تتطلع على مقدار ذاكرة الوصول العشوائي التي تستخدمها كل علامة تبويب، كما سترى عادةً استخدام الذاكرة بالميغابايت (MB)، لذلك، إذا رأيت أي أرقام عالية مريبة في عمود (الذاكرة)، فمن المحتمل أن موقعًا تقوم بتصفحة أو علامة تبويب معينة تبطئ جهازك.

أيضًا، عند فحص عمود (تأثير الطاقة)، فسوف تتطلع على استخدام طاقة وحدة المعالجة المركزية لكل علامة تبويب، حيث سترى تسميات مثل (منخفض) و (متوسط) و (مرتفع) متتاية بجانب أرقام قياس تأثير الطاقة النسبي، بحيث تعني الأرقام أكبر (الأعلى استخدامًا للطاقة).

لذلك، ضع في اعتبارك أن علامات التبويب ذات التأثير العالي على الطاقة، تعمل على إبطاء أداء وحدة المعالجة المركزية لجهازك الكمبيوتر، مما يؤدي إلى استخدام المزيد من الطاقة الكهربائية، واستنزاف بطارية الجهاز بشكل أسرع.

أيضًا، إذا وجدت سهمًا صغيرًا بجوار علامة تبويب معينة، فانقر فوقه للاطلاع على النوافذ الفرعية وأجهزة التتبع قيد الاستخدام، حيث تعمل بعض المواقع على طلب مواقع ويب أخرى خارجية لتوفير وظائف إضافية، ويمكن للمواقع الخارجية استخدام الموارد أيضًا.

بعد النقر فوق السهم، سترى جميع أدوات التتبع والإطارات الفرعية التي يتضمنها موقع الويب في التعليمات الخاصة بها.

أخيرًا، بعد معرفة كيفية فحص قوائم مدير المهام وكيف تعرف علامات التبويب أو المواقع التي تستنزف موارد الجهاز، إذا كنت ترغب في إغلاق علامة تبويب قد تجدها مزعجة، فضع مؤشر الفارة فوق علامة التبويب، ثم انقر فوق الزر (X) بجوار التبويب المحدد، وسيتم إغلاق علامة التبويب.

يمكنك أيضًا بهذه الطريقة إغلاق أي عدد تريده من علامات التبويب، وهي طريقة سهلة وسريعة تسمح لك في إدارة قائمة هائلة من علامات التبويب المفتوحة.

Just like Windows OS, Firefox also comes with a native Task Manager feature. This built-in feature helps you find those extensions or add-ons and tabs which consume high CPU and RAM usage.

This feature is very much similar to Google Chrome Task Manager. You can see the list of all the tabs and add-ons with their energy impact and memory usage and close such tabs. This can be very helpful when Firefox hangs or runs slow. You can check which tabs are consuming more resources and kill them.

You can’t close or kill an add-on using Task Manager but access the page of that add-on using it to disable or turn off an add-on. In the image above, you can see the built-in task manager of Firefox.

How to use the Task Manager in Firefox

To access and use the Firefox Task Manager:

  1. Open Firefox menu
  2. Select Task Manager option
  3. Use the cross button to kill a tab or access the Add-ons Manager to turn off an add-on.

In this basic step, you need to launch your Firefox browser. After that, click on the Open menu icon or hamburger icon available on the top right side. In the Firefox menu, access the More section, and select Task Manager option.

How to use firefox’s built-in task manager

Alternatively, you can also type about:performance in the address bar and press the Enter key to launch Firefox Task Manager.

Now you will see all the add-ons and tabs that are currently running or active. It will show the name, Type (add-on or tab), RAM or memory usage of each tab and add-on, and Energy Impact (Medium, High, or Low) in real-time.

How to use firefox’s built-in task manager

If some tab is consuming high energy and memory usage is also high, then that could be the reason for slow performance. You can simply close or kill that tab using the task manager. For this, click on the name of that particular tab and you will see a cross button. Use that button to close the tab. –>

How to use firefox’s built-in task manager

If it is an add-on, then you will see Show in Add-ons Manager icon. Clicking on that icon will directly open the add-ons page using which you can turn off that particular add-on.

Firefox Task Manager is actually very useful for those who use Firefox as their default browser. Some add-ons run silently in the background and consume RAM and energy unnecessarily. You can find all such add-ons and tabs and take the necessary action. –>

How to use firefox’s built-in task manager

If you’re experiencing slow performance while browsing the web with Microsoft Edge, you can use Edge’s built-in Browser Task Manager to identify which sites or extensions might be bogging down your system with heavy resource usage. Here’s how to use it.

First, open “Microsoft Edge.” Click the ellipses button (three dots) in the upper-right corner of any Edge browser window. In the menu that pops up, select “More tools,” then “Browser task manager.”

How to use firefox’s built-in task manager

When the Browser Task Manager window opens, you’ll see a list of all tabs, processes, and extensions running in the browser. Data for each one is divided into four columns. Here’s what each column means:

  • Memory: This shows how much system memory a tab or process is using in kilobytes.
  • CPU: This shows what percentage of your total CPU capacity (processing power) a tab or process is using.
  • Network: This shows the amount of network bandwidth in use by the tab or process in bytes or kilobytes per second. Tabs with open sites that stream media like video or music will use more.
  • Process ID: This shows the process ID of the tab or process, which is mostly useful for in-depth developer troubleshooting.

How to use firefox’s built-in task manager

At any time, you can click the “Memory,” “CPU,” or “Network” column header, Task Manager will sort the tabs and processes by resource usage.

For example, if you’d like to figure out which tab is using the most memory, click the “Memory” column header, and the most memory-intensive tabs will move to the top of the list. Likewise, if you want to see which tabs are using the most CPU power, click the “CPU” column header.

How to use firefox’s built-in task manager

If a tab or process is taking up too much CPU, memory, or network bandwidth and becomes unresponsive, you can force it to close using Edge’s Browser Task Manager. To do so, select the tab or process from the list, then click the “End process button.”

How to use firefox’s built-in task manager

You can also use Browser Task Manager to manage large numbers of tabs at once. For example, if you have 100 tabs open and would like to close many of them at once, select them in a group within Task Manager and click “End process.” Just make sure you have any work in those tabs saved before you close them suddenly. Happy browsing!

Firefox has a hidden task manager – Here’s how to use it!

Mozilla has made lots of improvements to the Firefox browser. Now it has become a more capable browser in terms of performance, stability & features. As of now, Firefox seems to be the best Google Chrome alternatives. Unlike Chrome, Firefox doesn’t slow down the entire device, and it also has extension support.

Not many would know, but Firefox also has a task manager. The Firefox Task Manager is hidden under the settings. The good thing about Firefox’s task manager is that it lists all the tabs, trackers, and add-ons consuming system resources.

The task manager feature can be useful when diagnosing high CPU or Memory usage in Firefox. So, in this article, we are going to share a working method to enable and use the hidden task manager of the Mozilla Firefox web browser.

Steps to use the Task Manager of Firefox:

Unlike Chrome, Firefox doesn’t let you open the task manager from the tab menu. Also, there’s no keyboard shortcut to access the Task Manager. To open the task manager, you need to follow the steps given below.

Step 1. First of all, open the Firefox web browser on your PC.

Step 2. Now on the address bar, type in ‘about:performance’ and hit Enter. This will open the Task Manager.

How to use firefox’s built-in task manager Type in ‘about:performance’ and hit Enter

Step 3. Alternatively, you can also click on the menu icon and select the ‘More’

Step 4. From the menu that appears, select ‘Task Manager’.

How to use firefox’s built-in task manager Select ‘Task Manager’

Step 5. This will open the task manager.

How to use firefox’s built-in task manager

Step 6. The task manager will display some useful information about the tabs. This information is displayed in multiple columns:

  • Name: Displays the name of the tabs or extensions currently running within the browser.
  • Type: This one indicates whether the item is a tab or an add-on.
  • Energy Impact: This one shows the processing power being used by the CPU.
  • Memory: This one shows the amount of RAM used by any tab or add-on.

Step 6. To kill any tab or add-on, just click on the ‘Cross’ icon.

Click on the ‘Cross’ icon to close the tab or add-on

That’s it! You are done. This is how you can access the hidden task manager of the Firefox browser.

So, that’s all from us for today! By following this method, you can quickly figure out the resource-hogging tab or extension on Firefox. I hope this article helped you! Please share it with your friends also. If you have any doubts related to this, let us know in the comment box below.