General

Opening the Firefox configuration

Zoom feature

Creating a screenshot

Search Hijacker

Missing Toolbar

Turning off automatic Firefox update

Malware

Disable hardware acceleration

Add-ons

Uninstalling an extension

Switch to previous persona

Common troubleshooting steps

Starting Firefox in Safe Mode

Get troubleshooting information

Clean reinstall

Reset Firefox

Crashes

Firefox crashes

Firefox crashes when you open it (Windows)

Firefox crashes when you open it (Mac)

Plugins

Plugin check

Recent Flash issues

Choose another PDF reader

Printing and print preview

Check print margins

Cache and Cookies

Clear cache and cookies

Reload a site and bypass the cache

Search

Reset location bar search provider

Changing default search engine

Firefox for Android

Clear cache and cookies (Android)

Add Quit back (Android)

No Firefox for iOS and Symbian (Android)

Customizing the start screen (home page) (Android)