To uninstall Firefox, follow these steps:

1. Close Firefox (if Firefox is open): Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
2. Open the Applications folder in Finder.
3. Drag the Firefox application to the Trash.

Your uninstall of Firefox is finished.

• If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux for details.
• If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory to uninstall Firefox.

1. Close Firefox (if it is opened): Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
2. Click the Windows Start button and select Control Panel.
   
3. In the Control Panel window click on Add or Remove Programs. The Add or Remove Programs window will open.
4. Select Mozilla Firefox from the list of currently installed programs.
5. To begin the uninstall, click the Remove button to the right of Mozilla Firefox. The Mozilla Firefox Uninstall Wizard window will open.
   If the Uninstall Wizard does not run, you can start it manually by running helper.exe, which is located by default in C:\Program Files\Mozilla Firefox\uninstall\helper.exe.
6. In the Mozilla Firefox Uninstall Wizard window click Next.
7. Click Uninstall.
8. Click Finish.
9. To remove other files and folders that may not be removed by the uninstall, you must manually delete the Firefox installation folder, which is located by default in C:\Program Files\Mozilla Firefox.

Start the Mozilla Firefox uninstall

To begin the process of uninstalling Firefox, follow these steps:

Complete the Mozilla Firefox uninstall

To finish uninstalling Firefox, follow these steps:

1. Click Next in the Mozilla Firefox Uninstall window. The next window that opens will show the location of the Firefox program that will be uninstalled.
   
2. Click Uninstall.
3. Click Finish to complete the uninstall.
4. To remove other files and folders that may not be removed by the uninstall, you must manually delete the Firefox program folder from the location shown in the Uninstall Mozilla Firefox window (usually C:\Program Files\Mozilla Firefox or C:\Program Files (x86)\Mozilla Firefox).

1. Click the Finder icon in the dock.
2. In the menu bar click the Go menu, hold down the option or Alt key and select Library. A window will open containing your Library folder.
3. Open the Application Support folder.
4. Delete the Firefox folder.

1. (Ubuntu) Click the Places menu on the top right of the screen and select Home Folder. A File Browser window will open.
2. Click the View menu and select Show Hidden Files if it isn't already checked.
3. Open the folder marked .mozilla.
4. Delete the folder marked firefox.

1. Click the Windows Start button and select Run…. A Run dialog will open.
   • Alternatively, you can press +R to open a Run dialog.
2. Type in %APPDATA%\Mozilla\ and click OK. A window will open containing the Firefox folder.
3. Delete the Firefox folder.

1. On the Start Screen click the Desktop tile. The Desktop view will open.
2. On the Desktop hover in the lower right-hand corner to access the Charms.
3. Select the Search charm. The Search sidebar will open.
4. Type %APPDATA%\Mozilla\ in the search field and press Enter. A window will open containing the Firefox folder.
5. Delete the Firefox folder.

1. Click the Start button or press the key.
2. Type %APPDATA%\Mozilla\ in the search field and press Enter. A window will open containing the Firefox folder.
3. Delete the Firefox folder.

Alternatively, you can press +R to open a Run dialog, type in %APPDATA%\Mozilla\ and press Enter to open the Mozilla folder, then delete the Firefox folder.