How to disable/remove/uninstall incompatible add-ons in Firefox

firefox-extensions_thumbnailJust wanted to explore some add-ons after I installed the final version of Firefox 3.0 today. I found this add-on named TwitterFox in Get Add-ons Tab after I clicked Tools –> Add-Ons option. Excitedly installed it since I am using Twitter accounts now. But after the TwitterFox installation, my firefox 3.0 acted very wired. I could not bring the Firefox screen focused. It always hid in the taskbar, and the left/right click of my mouse did not even work at all on FireFox in the taskbar.

I knew there was in-compatible going on here since I installed Google Gear add-on in FireFox too. Since I have not used TwitterFox at all yet, the first thing came to mind was to disable it to see whether FireFox would come back to normal.

But how I could disable TwitterFox add-on since I could not even open FireFox and then could not open the Add-ons dialogue window. I looked up all file directories of FireFox installation on my local machine, and could not have any clues to delete such add-on.

Well, fortunately I found out that I could use Firefox Safe Mode to resolve this annoying problem.

Here you go:

  1. Do not use the FireFox shortcut on your desktop, go to Start menu, and All Programs — > Mozilla FireFox, and select the second one – Mozilla FireFox (Safe Mode).
  2. And you will see this window below, and you check the first option – Disable all add-ons.
  3. And click Continue in Safe Mode, your FireFox browser should be opened again. Now you can proceed to the normal procedure of “disable add-ons in FireFox” (the following steps copied from How to Uninstall an addon in Firefox)

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Question: How do I uninstall an add-on in Firefox?

Answer: You can uninstall an add-on in Firefox by doing the following:

1) Click on ‘Tools‘ located in the top menu bar of Firefox.
2) In the drop-down menu, click ‘Add-on‘.
3) In the small pop-up window, click on the add-on on you want to uninstall and then click on the ‘Uninstall‘ button.

Note: You will need to restart Firefox to complete the process. (if you just want to pause/stop the add-on for a while, please click on ‘Disable‘ rather than ‘Uninstall’.

7 thoughts on “How to disable/remove/uninstall incompatible add-ons in Firefox

  1. Pingback: Travelers - Check Your Browsers! « Passpack Blog

  2. jp

    This does not work. Even if you start in safe mode, all incompatible addons are grayed out and all of it’s buttons are disabled.

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  3. Mark

    Indeed, I tried this to get rid of a HP printing add-on which was made incompatible by a FF update. Even when starting the way you say, all addons are disabled, but the incompatible one is grayed out and you can uninstall it.

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  4. HarryH

    fyi you can delete incompatible extensions whose uninstall button is “greyed out” by deleting a registry key. Open regedit and go to the following registry dir
    [HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Firefox\extensions]
    Look for the offending entry and delete it. The files may still be hanging around somewhere, but the extension will be removed from the installed add on list.

    [Reply]

    John replied on March 4th, 2011:

    @HarryH, Thank you!

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    Reply
  5. Cornan The Iowan

    The Registry key mentioned above does not exist on my Windows 7 machine under Firefox 8.

    Still can’t remove disabled add ons

    [Reply]

    juggle replied on April 1st, 2012:

    @Cornan The Iowan,

    If you’re running 64bit Windows 7, check the path \HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mozilla\Firefox\Extensions. Different reg path for 32 bit applications running on a 64 bit machine.

    [Reply]

    Reply

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