Reset Firefox preferences to troubleshoot and fix problems
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- Revision id: 21199
- Created:
- Creator: AliceWyman
- Comment: minor edit to last revision
- Reviewed: Yes
- Reviewed:
- Reviewed by: Verdi
- Is approved? Yes
- Is current revision? No
- Ready for localization: Yes
- Readied for localization:
- Readied for localization by: Verdi
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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).
- Click to 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.