Firefox Using Too Much Memory: Here Is How To Fix It

At times, Firefox can use more memory than it actually should and this can make Firefox slow and in several instances, it can even prompt a Firefox crash.

While the performance of Mozilla Firefox is excellent, this can be pretty frustrating. Depending on the Operating System, you can estimate as well as monitor the memory usage with the help of precise tools. The Task Manager is that tool in Windows PCs.

So, when the Task Manager indicates that Firefox is using too much memory, you can refer to this guide for the solutions to it.

Disable Extension and Theme

First of all, make sure to disable the extensions and themes, as both of it can provoke Firefox to utilize too much memory. 

To determine whether the reason for the excess memory usage is theme and extensions, run the Firefox in safe mode and observe its memory usage.

The extensions and themes do not work in safe mode. So, if you notice any notable improvement after running Firefox in Safe mode, try to disable or even uninstall the extensions to fix this issue permanently.

Intrusive Content Hiding

Many times the web pages contain content that is not really needed or uses memory to display. In such cases, Firefox built-in content blocking can assist you to conserve memory. 

Apart from that, it can also assist you in preserving memory by blocking any third-party tracking content from loading.

Check Flash Hardware Acceleration

If your Adobe’s Flash Playe plugin is installed correctly, interpreting of Flash video content in a full screen can be effortlessly activated by the hardware. Apart from that, it can also be beneficial in easing the memory usage in the case of dedicated graphics card memory. So, you need to enable the Flash hardware acceleration.

Here is how you can do so:

  • First of all, go to a page that displays a Flash video.
  • Now after this, right-click on the video player.
  • After this, click the Settings option in the context menu.
  • You will see that the Adobe Flash player settings screen will appear on your screen.
  • After this, select the icon at the of the left corner of the Adobe Flash Player settings window at the bottom of the screen. A display panel will appear.
  • Now, check whether the Enable hardware acceleration option is selected or not.
  • Now, click Close to close the settings window of the Adobe flash player.

Restart Firefox

Apart from that, Firefox memory usage may increase in certain instances if it is not closed for a long duration of time.

A modest resolution to it is restarting Firefox periodically. You can also configure your Firefox browser to save all the tabs and windows. With this, you can resume your work from where it was stopped.

Other Applications

Sometimes, your storage may get full due to other applications. Well, having another application run simultaneously can slow down your device. Therefore, it is better to close applications that are running unnecessarily and the memory usage may reduce. 

Exert Fewer Tabs

Each tab claims firefox to save a web page in their memory. If you open several tabs frequently, it is better to consider using a device more lightweight so that you can keep track of things you do and the tasks you perform.

Add Some Ram to Your Computer

If none of the tips are working and you notice that the memory is still full to the maximum, maybe all your computer needs is some extra memory. Nowadays, RAM is pretty cheap and can provide you a huge performance boost. 


Firefox Memory issues are considerably common and the solutions above can provide you aid from all these issues.

However, if the problems still persist it is better to consult a professional who can assist and resolve the issue for you. Please let us know in the comments whether these solutions were helpful for you or not. 

Nathaniel Villa
Nathaniel Villa