I-Firefox Community Forum

Last week, all 11 of my Firefox extensions, which I've been using for years, were suddenly disabled. For each I got the same message: "[Extension name] could not be verified for use in Firefox and has been disabled." Following Firefox's instructions, in about:config I switched "extensions.langpacks.signatures.required" to FALSE, restarted my computer, but nothing changed. I tried reinstalling the extension Adblock Plus from Firefox's own list of add-ons, got the message "Installation aborted because the add-on appears to be corrupt." Any idea what's going on and what I can do?? Thank you.

iMac OS 10.11.6 El Capitan; Firefox version 78.15.0esr (64-bit)

On my Macbook Pro — OS 12.7.6 Monterey, Firefox version 136.0.2 (64-bit) — the same extensions work just fine.

Добрый день! Я много лет использую firefox для работы, я работаю в банке, и недавно нам дали расширение для мессенджера где ми общаемся с клиентами и можем добавлять документы легче и другие функции. У меня возникла проблема, так как я не могу его установить никак. Я питалась установить его по инструкциям с сайта, но безуспешно. Расширение фактически самостоятельно написано нашими разработчиками и инструкция по установке только на Chrome, и вігдядит она примерно так: скачиваете себе архив, извлекаете файлы пишете chrome://extensions включаете режим разработчика и загружаете туда файлы что были извлечены из архива.

Прошу детальную инструкцию как я могу это сделать для firefox.

How do I move an addon from the TOOLBAR into the PUZZLE PIECE list? I can get them OUT onto the Toolbar.

Also, the Customize Toolbar / overflow menu won't accept anything, the addon just pops back out when dragged from the Toolbar.

Hi, I need help with installing & testing an add-on. I've co-written the add-on with ChatGpt. When trying to install I get the message "can't install because the add-on appears to be corrupt". I've tried installing with anti-virus & firewall off, added an add-on ID & re-installing FireFox. What should I do? Any help much appreciated ! Regards, /S

When I open Amazon's page a splash screen appears that takes up a third of the screen. This splash screen provides keystroke shortcuts. Are you responsible. If HOW MAY I PERMANENTLY ELIMINATE THIS ANNOYANCE?

Firefox says versions earlier than 115.13 will be impacted by the certificate expiration. I've updated to 115.21 My add-ons are still disabled. https://support.mozilla.org/en-US/kb/root-certificate-expiration

It seems many don't know or haven't noticed but merely running an esr branch (rather than a developer edition) will also give you the option to enable add-ons with expired certifications via about:config.

Anyway, the "legit" way isn't working.

The moment my version of Firefox auto-updated to 141.0.2 (64-bit), all of my extensions disabled. There is no option to re-enable them and no indicator of why they are disabled.

I found that switching to a new profile allows them to work, but of course that's not really an option; I have huge amounts of custom stuff in eg. Greasemonkey that I cannot afford to lose.

What can I do to preserve my extensions without losing things like Greasemonkey scripts? Again, deleting them and reinstalling them is not an option if it would lose their individual configurations.

With the latest update to Firefox, 147.0.1, our test suites run with the extension, Selenium IDE, has errors, "Failed:n.createEvent(...).initKeyEvent is not a function". I am running the latest version of Selenium IDE. Installing the previous version of FF has no errors. What is the solution?

Good morning,

Youtube has blocked my access because Firefox blocks the ads. This happens only on Firefox not on other browsers. I have the ads blocker disabled in the settings (see picture attached). Could you please tell me how to get this resolved. Regards.

my Extension wallet (metamask) is not being open on this browser. this wallet was connected on "paericle network" tesnet project. i need to open my wallet. pleasse check it.

every website i go to says I have AdBlock Plus enabled as an extension, ad-on or whatever. I can not find it anywhere in the extensions menu, add-ons manager, etc. to turn it off... I have looked in every folder and area that I can, looked through my entire account info, profile, security, extensions, plug-ins, etc. Can you please help me find it so I can turn it off, uninstall etc.

Thank you for your help!

On the https://addons.mozilla.org/en-US/firefox/addon/nordvpn-proxy-extension/ tab, NordVPN appears to be installed as the button indicates "Remove". I have logged into NordVPN but do not have the NordVPN icon in top-right corner.

Configuration: Windows 10 just installed: October 14, 2025—KB5066791 (OS Builds 19044.6456 and 19045.6456) FireFox: 143.0.4 (64-bit)

Unable to install ad blockers; keep getting a message that ad blocker i"s corrupt."

Never had this before from Firefox - what do I do? The ads are disturbing me!

I did a new Windows 10 install yesterday. I then added my favourite apps.

When I got Firefox installed, adjusted the settings and added my extensions (most of which I've used for years), I found a glitch.

The icons for AdBlocker Ultimate and LastPass do not show up in the Customize Toolbar menu. I keep both of these on my toolbar in the past.

I've tried restarting Firefox several times and, finally, tried running it in Troubleshoot Mode. The last, it seems, doesn't allow the use of extension.

So ... please help!

The following extensions do not have shortcuts:

   AdBlocker Ultimate
   AI Grammar Checker & Paraphraser – LanguageTool
   IDM Integration Module
   Kaspersky Password Manager
   Kaspersky Protection
   Malwarebytes Browser Guard
   Privacy Badger
   Return YouTube Dislike
   Weather
   WOT Website Security & Privacy Protection

WHY?