Fix slowness, crashing, error messages and other problems

In English

• Reset Firefox – easily fix most problems
• Why can't Firefox for mobile play Flash on my device?
• Reset your Master Password if you've forgotten it
• Firefox for mobile is slow - How to make it faster
• Uninstall Firefox from your computer
• Navigation buttons like back, home, bookmarks and reload are missing
• Uninstall Firefox from your Android device
• Firefox for Android will not load pages on Android 4.0 (Ice Cream Sandwich)
• How do I find the Firefox for Android version number?
• How to fix common problems with Firefox OS Developer Preview
• Stop Firefox from opening multiple tabs when it starts
• Firefox is stuck in Safe Mode
• Firefox for Android may cause HTC Desire with Android 2.2 to reboot with casual browsing
• Firefox repeatedly opens empty tabs or windows after you click on a link
• Fix printing problems in Firefox