We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Rohkem teavet

Unable to install any addon

  • 4 vastust
  • 3 on selline probleem
  • 5 views
  • Viimati vastas agent666

more options

Hi.

Basically, I cannot install any addon. When I hit "Add to Firefox", a popup showing permissions appears, but the "add" and "cancel" does not work at all.

I tried downloading the xpi file and installing by opening it or clicking "Install add-on from file" in the Add-On manager but to no avail.

I also don't remember when I first got the problem. Maybe it was after updating to a newer version. I hesitated in asking for support, because it's such a pain to have to migrate everything manually. I used to use FEBE before. If there's no way for an easy migration to a new profile or easy fix, I rather stay as it is.

Thank you.

Hi. Basically, I cannot install any addon. When I hit "Add to Firefox", a popup showing permissions appears, but the "add" and "cancel" does not work at all. I tried downloading the xpi file and installing by opening it or clicking "Install add-on from file" in the Add-On manager but to no avail. I also don't remember when I first got the problem. Maybe it was after updating to a newer version. I hesitated in asking for support, because it's such a pain to have to migrate everything manually. I used to use FEBE before. If there's no way for an easy migration to a new profile or easy fix, I rather stay as it is. Thank you.

Muudetud agent666 poolt

All Replies (4)

more options

Possibly just a single file has become locked or corrupted; you may not need to do much more than remove that file and let Firefox regenerate it. Unfortunately, there's no way to know without trying.

Before getting into that:

(1) Does your current profile contain any files copied from other profiles?

(2) Does the Add-ons page, Extensions panel, work normally or is that broken in some way(s) as well?

more options

Thank you for replying.

1. The only file I copied from another profile is the "userChrome.css" inside the chrome folder.

2. The Add-On page work just fine. I can change addons settings, activate/deactivate them. Themes too.

more options

Hi agent666,

We're very sorry for the inconvenience here.

There has been a technical issue with Add-ons that the Firefox team is working on urgently (it affects in the installation of new add-ons and usage of installed add-ons). You can expect a resolution soon.

You can track updates to the issue through this post: https://discourse.mozilla.org/t/certificate-issue-causing-add-ons-to-be-disabled-or-fail-to-install/39047/

Sorry again, George

more options

geroter said

Hi agent666, We're very sorry for the inconvenience here. There has been a technical issue with Add-ons that the Firefox team is working on urgently (it affects in the installation of new add-ons and usage of installed add-ons). You can expect a resolution soon. You can track updates to the issue through this post: https://discourse.mozilla.org/t/certificate-issue-causing-add-ons-to-be-disabled-or-fail-to-install/39047/ Sorry again, George

Hi geroter,

Thanks but the recent issue is not related to my problem. At least, mine's dated back for about 2 to 4 months ago.