Reset Firefox preferences to troubleshoot and fix problems
- Revision id: 36829
- Creator: Jan.
- Comment: fixed FOR version mismatch, replaced article with prefs.js
- Reviewed: Yes
- Reviewed by: Ashishnamdev
- Is approved? Yes
- Is current revision? No
- Ready for localization: Yes
- Readied for localization:
- Readied for localization by: Ashishnamdev
Resetting preferences (zoom, tabs, privacy, network, encryption, download actions, etc.) is one of many procedures that can be helpful in fixing Firefox issues. This has been simplified in the latest version of Firefox. Now you can restore Firefox to its factory default state while saving your essential information.
- Click this Refresh Firefox button directly, if you are viewing this page in Firefox.
This won't work if you are using a different browser or on a mobile device.
- You can also find a Refresh Firefox button at the top of the Firefox about:support Troubleshooting Information page.
- To continue, click in the confirmation window that opens.
- Firefox will close to refresh itself. When finished, a window will list your imported information. Click and Firefox will open.
When troubleshooting Firefox problems, resetting preferences (zoom, tabs, privacy, network, encryption, download actions, etc.) is one of many procedures that can be helpful in pinpointing the issue. This article explains how to reset preferences by either removing the preferences files.
How to reset preferences to default
- Exit Firefox completely (if open).
- Open the Firefox profile folder.
- Delete (or rename) the prefs.js file. Warning: If you find more than one prefs.js file or a "prefs.js.moztmp" file, delete these files as well and read How to fix preferences that won't save.
- Delete the user.js file, if found, or move it to a backup location (this file does not exist by default).