Is Firefox spoiling your web browsing experience by consuming high CPU and memory usage? Here’re some easy ways that you can try to fix it.


When browsing something using the Firefox browser, it consumes more memory and takes high CPU resources to display the web content or download something from the web.

If you’re facing such types of problems and frustrating with much memory usage while using Firefox then this post presents some effective ways to fix your problems. Before going to try the complex solutions, let’s do that.

First close all tabs, and clear all recent history or cache. Second, ensure you’re using the latest version of the Firefox browser (If not then Update it) and Restart your Firefox. 

1. Restart Your PC

Due to the operating system issues, your browser consume high CPU usage even other software or applications that are installed in your device may consume more resources.

So, restarting your entire computer is one of the best options to fix your operating system issues and reduce your high CPU usage while web browsing. No matter which operating system, you can use on your computer.

2. Update & Restart Firefox

Sometimes, due to the older version of your Firefox browser, it takes high CPU and memory usage. So, make sure you can use updated Firefox browser.

The updated version can include better functionalities, improve performance and also enhance security. Updating your software can resolved such types of issues as consuming a high CPU usage.

Follow the below steps to Update your Firefox browser.

Step 1: Open the Firefox browser on your PC.

Step 2: Tap on the horizontal three-line (menu) icon at the top-left corner of Firefox.

Step 3: Go to Help and click on the About Firefox option. The Firefox will check the latest updates, if it is available then by default Firefox will be downloaded automatically.

Step 4: Once the download is finished. You’ll get the Restart to update Firefox option, tap on it to restart your Firefox browser.

3. Utilize Troubleshoot Mode

Installing a lot of third-party extensions and themes in Firefox causes high CPU and memory usage. To remove or disable them, Troubleshoot mode is one of the good options.


By using Troubleshoot mode, you can refresh your entire Firefox browser. When you enable this feature, it temporarily disabled all third-party themes, extensions, and some other custom settings.

To enable Troubleshoot mode in Firefox, Just Go to Menu > Help. Click on the Troubleshoot Mode option. Then you’ll get the pop-up screen, tap the Restart button.

When you tap on the Restart button, you’ll get two options. The First will Open and the second will Refresh Firefox.

Also Read: 7 Ways to Transfer Your Files from Android to PC

If you want to enable this feature then click on the Open button, it will be temporarily disabled you’re all themes, extensions, and other customizations. 

However, if you don’t want to enable this feature and want to remove all third-party extensions and other customization permanently then select the Refresh Firefox option. Don’t worry; it won’t delete your essential information such as passwords or bookmarks. Actually, it refreshes your Firefox to its default settings.

For more troubleshooting options, Go to Menu > Help > More Troubleshooting Information. Here you’ll get the details troubleshooting information and all diagnosis options. Here you can refresh, troubleshoot and clear the startup cache.

4. Enable the Firefox Hardware Acceleration


Some computer has running on high graphic intensity elements, so that reason it takes extra CPU or memory usage. The hardware acceleration is a more useful and essential feature to manage it.

Follow the below steps to enable hardware acceleration in your Firefox browser.

Step 1: Click on the top-right corner menu (Horizontal three-lines) and Go to Settings.

Step 2: On Settings, Choose the General section.

Step 3: Scroll down the General section page up to Performance.

Step 4: Uncheck Use recommended performance setting option and enable the Use hardware acceleration when available.

The working of this feature depends on your computer system. If your system is too old or anemic GPU, then it might not give you the result that you actually expect.

5. Set A Low Content Process Limit

Yes, you need to set your content process limit at low to reduce its memory usage. Now you think having more content processes can valuable to enhance performance.

Absolutely, but if your computer system has contained higher than 8 GB RAM because it consumes more memory usage. Otherwise, it might not give you the expected results.  

Follow these steps to set a low content process limit.

Step 1: Click on the top-right corner menu and open Settings.

Step 2: On Settings, Select the General section.

Step 3: Scroll down the General section page up to Performance.

Step 4: Next, uncheck the Use recommended performance setting option.

Step 5: Select one of the lower Content process limits and set it as new.

Step 6: Restart your Firefox browser.

6. Increase Tracking Protection by Using Strict Mode

There are three tracking modes offer by the Firefox browser whereby default the Standard mode is applied to your browser. But if you want to enhance tracking protection to blocks more cookies, malicious scripts and trackers then Strict mode is essential for you.

Using this mode, you can enhance your browser speed and reduce CPU usage. Let’s see how you can turn on Script mode into the Firefox browser.

Step 1: Click on the horizontal three-lines at the top right corner of Firefox.

Step 2: Open Settings.

Step 3: On the Settings, go to Privacy & Security.

Step 4: Now, enable the Strict Mode by tapping on it. To apply the changes that you do, you will need to reload all tabs.

7. Erase Your Saved Firefox Profile File

Firefox browser reserves your every browsing-related data in your profile folder. However, this folder keeps your every information about every setting you change in the browser and also any saved passwords.

So, it takes more memory and CPU usage if one of those files is corrupt. But don’t worry; you can delete this content-prefs.sqlite file. Here’s the steps to do it.

Step 1: Go to the Firebox browser menu and scroll down to Help.

Step 2: Click on the More troubleshooting information option.

Step 3: On the Application Basics, find the Profile Folder and tap the Open Folder button.

Step 4: Locate and delete the content-prefs.sqlite file by right-clicking.

Step 5: Restart your Firefox browser. 

Get Back your Normal Firefox 

Using these methods, you can now get your normal CPU and memory usage while using Firefox.

Hopefully, these methods will helpful for you to fix your Firefox issues. So, if you implement these above methods on your browser but still your browser contains more CPU or memory usage then might be you need to change your system.