Fix slowness, crashing, error messages and other problems
- Fix problems with websites (Facebook, YouTube, webmail etc.)
- Unblock Firefox from connecting to the Internet
- Procedures to diagnose and fix problems
- Videos, sound, pictures and animations don't work
- Firefox is slow or stops working Slowness or hanging
- Firefox crashes Crashing
- Firefox won't save settings or remember information
- Problems with add-ons, plugins or unwanted software
In English
- Refresh Firefox - reset add-ons and settings
- How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites
- How to troubleshoot time related errors on secure websites
- Firefox Health Report - understand your browser performance
- Accessibility not available during multi-process support
- What do the SSLv3 error messages mean on Firefox?
- Avoid and report Mozilla tech support scams
- Unable to access secure (HTTPS) sites in Firefox 43
- Pages appear tiny when I print or view them in Print Preview
- Allow Firefox to load multiple tabs in the background
- Firefox crashes at startup after Symantec (Norton) update
- How to reset the default user agent on Firefox
- Norton Toolbar won't work with Firefox version 41
- Recover lost bookmarks on Firefox Developer Edition
- Lastpass was disabled after updating Firefox
- Rate your Firefox experience (Heartbeat)
- Hardware acceleration and WindowBlinds causes Firefox to crash
- My Mac won't shut down after updating to Firefox version 45
- Pre-8.1 versions of Websense cause startup crashes in Firefox
- Firefox crashes - Troubleshoot, prevent and get help fixing crashes
- What to do when searches take you to the wrong search website
- Firefox is stuck in Safe Mode
- Firefox repeatedly opens empty tabs or windows after you click on a link
- Reset your Master Password if you've forgotten it
- Fix video and audio playback problems on Firefox for Windows
- Wrong home page opens when I start Firefox - How to fix
- Avoid crashes - Tips and tricks
- Fix printing problems in Firefox
- How do I submit a bug for Firefox sync?
- Problems with email and how to find help
- Firefox keeps crashing at startup
- Home page with pipe character opens extra tabs when Firefox starts
- Can't add, change or save bookmarks - How to fix
- Navigation buttons like back, home, bookmarks and reload are missing
- How to run Firefox when your profile is missing or inaccessible