Uninstalling Firefox completely

Sometimes you may face strange behavior and annoying problems after you upgrade to higher versions of Firefox. One of the best solutions is uninstall everything and reinstalling entire package. However uninstalling Firefox does not remove your favorites, profiles, bookmarks, settings and any tweaks. If you want to completely remove all traces of Firefox from your system follow these steps:

I request you to take backups of your book marks, favorites or setting if needed before uninstalling everything.

1. Go to Control Panel>Add/Remove Programs in XP or Control Panel>Programs & Features in Vista, and if a 'Mozilla Firefox' entry (or similar) exists, select it and click Change/Remove and uninstall it. Reboot if required.

2. Go to your Documents and Settings\[username]\Application Data\Mozilla directory in XP, or the \Users\[username]\AppData\Local\Mozilla and \Users\[username]\AppData\Roaming\Mozilla\ directories in Vista and delete the entire \Firefox subdirectory and all of its contents. Note that this will delete all of your bookmarks and saved settings, so if you want to backup any or all of your current Profile, see the Customizing Firefox section on page 7 of this guide first. Typically all that I would recommend you backup and restore is your bookmarks.html file.

3. Go to your \Program Files\Mozilla Firefox\ directory and delete it and all of its contents.

4. Use the Registry Editor (Start>Run>Regedit) and delete the following keys - that is, right click on their name in the left pane of Registry Editor and select Delete:

[HKEY_CLASSES_ROOT\FirefoxHTML]

[HKEY_CURRENT_USER\Software\Classes\Applications\firefox.exe]

[HKEY_CURRENT_USER\Software\Mozilla]

[HKEY_CURRENT_USER\Software\MozillaPlugins]

[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla]

[HKEY_LOCAL_MACHINE\SOFTWARE\mozilla.org]

[HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins]