HOW TO COMPLETELY DELETE FIREFOX FROM MAC WINDOWS
(or, you can click "Start → Run." on Windows XP). For example, on Windows 7, press "Windows key + R" to open the Run box Rename (or delete) the Firefox folder in the default profile path (or move it to a backup location). This will remove your Firefox user profile data, which includes bookmarks, passwords, cookies, preference settings and added extensions.
This step is only recommended if you want to completely remove Firefox from your system, and you do not want to save any of your data. Note: In Firefox 30 and below on Windows, you can use the Firefox uninstaller option, "Remove my Firefox personal data and customizations" ( see above) instead of following these instructions. You may also need to manually change some Windows file associations or icons, even after setting a new default browser, as reported here. Revo uninstaller) since these tools can sometimes do more harm than good! Also avoid using 3rd party uninstallers (e.g. Note: Registry editing is a potentially hazardous undertaking. Normally, these extra entries are harmless and it is not necessary to remove them. The Firefox uninstall will leave behind some Windows registry entries. Windows Vista and above: C:\Users\\AppData\Local\Mozilla\ Firefox and C:\Users\\AppData\Local\Mozilla\ updates and/or C:\Users\\AppData\Local\VirtualStore\Program Files\ Mozilla Firefox (if found).Windows 2000/XP: C:\Documents and Settings\\Local Settings\Application Data\Mozilla\ Firefox.Deleting the wrong folder will remove your user profile data! Folders containing temporary Firefox data ( *.mfl files, Cache and Updates), which would be located here, if not removed by the uninstall process (you'll need to show hidden files and folders): Important: Make sure you delete the folder(s) under Local Settings or Local.
Windows XP and above: Delete all C:\WINDOWS\Prefetch\FIREFOX* files.( Optional) Delete the following additional files or folders (recommended if you are preparing for a clean reinstall):.
This step should not be needed unless the Firefox uninstall from the Windows Control Panel failed.