How to Troubleshoot Mozilla Firefox crashes

November 30, 2013 at 4:03 pm by

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Mozilla Firefox can crash for several reasons. However, with the browser’s Safe Mode & Reset features, it’s easy to fix many issues leading to a Mozilla Firefox crash.

Here we provide some simple procedures to troubleshoot Mozilla Firefox:

How to use Safe Mode:

Mozilla Firefox Safe Mode loads the browser without any add-ons. Follow the steps below to start Mozilla Firefox in Safe Mode:

If you see the menu bar at the top of the page, skip to step 3, otherwise follow all the steps below.

1.  Click on Firefox at the top-left corner.
2.  In the drop down menu, hover your mouse pointer over Options in the second column and click Menu.

3.  On the Firefox menu, click Help and select Restart with Add-ons Disabled.
4.  Select Restart from the dialog box that appears.

If Firefox’s Safe Mode works properly, the problem is with one of your add-ons. Exit Safe Mode and disable add-ons one by one to identify the add-on causing the crashes.

Follow the steps below to disable add-ons:

1. On the Firefox Menu at the top-left corner, click on Add-ons. The add-ons tab opens.
2. Select Extensions or Appearance or Plugins tab.
3. Click the Disable button adjacent to the add-on you wish to disable.
4. Restart Mozilla Firefox browser.

 

How to reset Firefox:

Your personal data in the profile folder of Mozilla Firefox may also cause crashes. The Firefox reset feature creates a new profile folder and you will lose your extensions, themes, and other settings when you reset Firefox. Extensions and themes may cause crashes, so resetting Firefox may be a solution to crashes.

Follow the steps below to reset Mozilla Firefox:

1. On the Firefox Menu at the top-left corner, click Help and select Troubleshooting Information.
2. Click on the Reset Firefox button.

Firefox creates a new profile for you and will migrate most of your old information. If Firefox works properly now, it means an extension is causing crashes.

Install your favorite extensions one-by-one to identify the extension that is causing crashes.

For more detailed troubleshooting, take a look at this article: Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Disable Hardware Acceleration:

The Hardware Acceleration feature of Mozilla Firefox speeds up web page rendering and takes some load off the CPU. However, it can cause problems with some graphic card drivers. You can disable it to determine whether it is responsible for crashes or not, but before you do that, there are a couple of tweaks that may help:

1. Open a new tab and in the address bar type About:Config and press Enter This is the Firefox configuration page; be careful what you edit here.
2. In the search box type Layer
3. Check the line – layers.prefer-d3d9 and if it says false, double click the line so that it changes to true
4. If that doesn’t work, try setting layers.acceleration.disabled to true.

Note: You will have to restart Firefox after each edit to apply the new settings.

The Best About:Config Tweaks That Make Firefox Better

Here is how you disable hardware acceleration:

1. On the Firefox Menu at top-left corner, click Options and select the Advanced tab.
2. Uncheck Use hardware acceleration when available option under the Browsing panel.
3. Click OK.

If Firefox works fine, it means hardware acceleration was causing the crashes. Update the graphics card driver of your system. It may fix the issue and you can use the hardware acceleration feature of Mozilla Firefox again.

Check for Malware

Malware can also cause Firefox crashes, so regularly perform a complete scan of your PC with an updated antivirus program.

Contact our Virus Support here at TSF for assistance on removing malware.

Update Software

Old versions of software and drivers may also cause Firefox crashes, so regularly update your software applications including Mozilla Firefox, Plug-ins, Extension and Themes, Windows, Graphic Drivers, Internet Security Software, etc.,

Hardware Problems

Hardware problems can also cause Mozilla Firefox and other software to crash. Check your RAM for errors if crashes occur frequently. For more information see How to perform a MemTest86+ Test

If you suspect hardware to be at fault, you can run the Windows System Diagnostic Report tool which, at the very least, will generate much needed information, should you decide to ask for assistance in our Hardware support forum.

Problems still persist?

Contact our Mozilla Firefox support team here at TSF for help on fixing the issue.

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