Reset Firefox preferences to troubleshoot and fix problems
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- Revision id: 21196
- Created:
- Creator: AliceWyman
- Comment: reworded Intro and linked to "Preferences are not saved" troublehooting article.
- Reviewed: No
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This article explains how to reset your preferences to the default settings using Firefox Diagnose Firefox issues using Troubleshoot Mode.
- If changes to preference settings are not saved when you restart Firefox, see How to fix preferences that won't save.
To reset preferences:
Click the menu button 
, click , select and click in the Restart Firefox in Troubleshoot Mode? dialog.
Note: You can also start Firefox in Troubleshoot Mode by holding down the Shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running:
You may need to specify the Firefox installation path (e.g. /usr/lib/firefox).
firefox -safe-modeYou may need to specify the Firefox installation path (e.g. /usr/lib/firefox).
- Put a check mark by Reset all user preferences to Firefox defaults.
- To apply your changes, click .
Firefox will restart with your preference settings changed back to the defaults.