Cannot remove an add-on (extension or theme)
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This article describes how to uninstall an extension or theme that cannot be removed by following the instructions in Disable or remove Add-ons.
Table of Contents
Uninstall from Firefox Safe Mode
If you cannot access the Add-ons Manager or if the button is grayed out for a certain add-on, you may need to uninstall it from Firefox Diagnose Firefox issues using Troubleshoot Mode.
Click the menu button , click
, select and click in the Restart Firefox in Troubleshoot Mode? dialog.Note: You can also start Firefox in Troubleshoot Mode by holding down the Shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running:firefox -safe-mode
You may need to specify the Firefox installation path (e.g. /usr/lib/firefox).- In the Firefox Safe Mode dialog, click .
Once Firefox has started in Safe Mode, try removing the add-on again and then restarting Firefox.
Uninstalling manually
If you are unable to remove an add-on in Firefox Safe Mode, first navigate to the folder where extensions are installed:
Open your profile folder:
- Click the menu button , click and select .From the The Troubleshooting Information tab will open. menu, select .
- Under the Application Basics section next to Profile FolderDirectory, click . A window will open that contains your profile folder.Your profile folder will open.
Note: If you are unable to open or use Firefox, follow the instructions in Finding your profile without opening Firefox.- Open the extensions folder inside your profile folder. Inside the extensions folder there are folders or XPI files for each extension and theme you have installed.
- To determine which folder or XPI file corresponds to the extension you want to uninstall, return to Firefox and the tab.
- In the Extensions section, find the extension you want to remove and note the string in the ID column.
- Click the Firefox menu and select .Click the Firefox menu at the top of the screen and select .Click the Firefox menu and select .
- Delete the folder or XPI file that corresponds to the extension ID you noted above.
Globally installed extensions
In rare cases, extensions are installed globally, into the Firefox installation folder. To remove a globally installed extension, follow these steps:
- Click the Firefox menu and select .Click the Firefox menu at the top of the screen and select .Click the Firefox menu and select .
- Go to your Firefox installation folder.
- Go to the extensions folder inside the installation folder.
- Follow the steps above to locate the appropriate folder to delete.
Uninstall from Windows Control Panel
Some add-ons are installed by other programs. You may be able to uninstall the add-on from the Windows Control Panel:
- (Windows XP): See How to change or remove a program in Windows XP at Microsoft Support.
- (Windows 7 and Vista): See Uninstall or change a program at Microsoft.com.
Extensions installed by other software
Sometimes installing or updating other software will add an extension which cannot be removed from within the Firefox Add-ons window because its button is not functional.
The software that added the Firefox extension may include an option to remove it. You should visit the support site of the software provider for more information. As an alternative, simply disable the extension in the Firefox Add-ons window if you no longer wish to use it. To disable the extension, select it, then click on its
button. The extension will be disabled after you restart Firefox.Microsoft .NET Framework Assistant
If you have programs that use Microsoft .NET Framework components, a Microsoft update may have installed an extension called Microsoft .NET Framework Assistant.
To remove this extension, follow the instructions in Microsoft's article How to remove the .NET Framework Assistant for Firefox.
Java Quick Starter
If you have Java software installed, you may see the Java Quick Starter extension in your list of extensions. This extension has its button disabled.
To remove this extension, follow the instructions to disable the Java Quick Starter in Oracle's Java Quick Starter article. You may need to close Firefox while executing those instructions.
When you restart Firefox, the Java Quick Starter extension will be removed.
Based on information from Uninstalling add-ons (mozillaZine KB)