Of course, the first step is obvious…
Exit Firefox completely. Â Close the application, and all firefox windows.
On Mac OS X:
- Drag the Firefox application to the Trash.
- (optional) Remove the Firefox .plist file, from ~/Library/Preferences/org.mozilla.firefox.plist
- (optional) Remove the User data and settings (Bookmarks, extensions, etc) from ~/Library/Application Support/Firefox
On Linux:
- Remove the firefox installation directory, which is usually /usr/lib/firefox-<version>
On Windows:
- Make sure to close Firefox Completely (Along with any Firefox windows)
- For Windows 7 / Vista, open Programs -> Programs & Features, Select Mozilla Firefox <version #>, and click the Uninstall button.
For Windows Xp (or below), double-click Add or Remove Programs, select Mozilla Firefox <Version #> Â in the list of installed programs, and click “Remove” to run the uninstaller. - Delete the Firefox Installation directory, by default, “C:\program files\Mozilla Firefox” or “C:\programs files (x86)\Mozilla Firefox”
- (optional) Remove the Firefox temporary data directory:
Windows 2000/XP: C:\Documents and Settings\\Local Settings\Application Data\Mozilla\Firefox
Windows 7/Vista: C:\Users\\AppData\Local\Mozilla\Firefox - (optional) Remove:
Windows 7/Vista: The C:\Users\\AppData\Local\VirtualStore\Program Files\Mozilla Firefox folder (if it exists) - (optional) Remove:
Windows XP and above: Delete all C:\WINDOWS\Prefetch\FIREFOX* files - If you installed the Quality Feedback Agent component (aka Talkback) in Firefox 2 or below, open the %APPDATA%\Talkback\MozillaOrg\ folder and delete any “Firefox” folders found (e.g., “Firefox10” “Firefox15” and “Firefox2”).