Firefox Community Forum

All of my addons are disabled and won't re-enable!

They all say "addon name" could not be verified for use in Nightly and has been disabled. See attachment clipboard00.jpg

If I try to install an addon from the recommended extensions settings (for example "return youtube dislike ") I get a message bubble stating "The Addon downloaded from this site could not be installed because it appears to be corrupt. {OK!}" See attachment clipboard01.jpg

The message above about addons appearing to be corrupt happens if I go to any of my current addon pages and try to redownload them.

Dear Sir,

Firefox is not working with Rabby Wallet and Metamask extensions.

It does no pop-up the window to see the transaction and sign it. Firefox 134.0.1 (64-bit). Windows 10 Home.

On Metamask at least I can click on the pinned extension and see the window. However it´s not the expected behavior, because it should open the pop-up automatically. With Rabby wallet it is impossible to proceed, even clicking on the extension icon.

Please fix it.

Hi there,

I’m using the Firefox Multi-Account Containers extension and would like to remove a site that’s been set to "Always open in [X] container." However, I don’t see a “Manage Site List” option anywhere in the container settings as seen here: https://support.mozilla.org/en-US/kb/containers

Here’s what I’ve tried so far:

   I’ve clicked the Containers icon and selected the gear ⚙ to edit a container.

   I enabled privacy.userContext.siteAssignments.enabled in about:config and set it to true.

   I restarted Firefox (with session restore on), but still no option appears to view or manage assigned sites.

I’m on Firefox Desktop (Mac), and I’ve confirmed that I’m using the official Multi-Account Containers extension.

Is this a bug, a UI change, or something I’m missing? I’d really prefer not to manually edit the containers.json file if there’s a built-in way to manage these assignments.

Thanks so much for any guidance!

Whay have extensions stopped workong with latest Firefox update. E.g. Last pass is listed as an installed extension but clicking in the installed list just gives a settings page, and there is no button to enable pinning to the top bar, so I can't access Lastpass at all in this way. Have updated Firefox to 134.0.2 and reinstalled the Last Pass extension but no change. Previously I have been able to pin Lastpass extension to the top bar next to the Download icon. Other icon that do work: Pocket, Download, Account, Noscript, Duckduckgo search, ABP and jigsaw piece. When will this get fixed pleased?

I have been using the iCloud Passwords extension successfully with MS Edge, but decided to switch back to Firefox as my default browser.

Having requested and installed the extension (v1.3.77.1), it shows as working in Firefox extensions management, and the icon appears in the toolbar, but a message is displayed when the icon is clicked, "Download iCloud for Windows to use iCloud Passwords".

The issue is that I already have iCloud for Windows installed and working, and iCloud Passwords working with Edge. It appears that Firefox cannot detect that iCloud for Windows is installed and working.

Please can you tell me if this can be resolved, and if so, how? Thank you.

The True Key extension from McAfee cannot be installed on Firefox. I have the latest updated version of Firefox 133.0.1 64 bit on my desktop Dell computer running Windows 11 Pro. When I try to install the True Key extension, a message pops up advising me that the extension cannot be installed due to a Firefox policy violation. I have reported the issue to McAfee for their action. Photo of the pop up message is attached.

Where possible I prefer to sign in using a passkey (stored on a USB key). I use a password manager for the rest, and have thus disabled password saving inside Firefox.

However, when password saving is disabled, Firefox will not prompt for using a passkey when inside a login field, this works when I re-enable password saving, but that leads to other annoyances.

Is there a way to enable passkey the passkey option without also enabling the password saving?

Hello, I am experiencing an issue where the MetaMask extension in Firefox is blocking search results on DuckDuckGo. When I disable MetaMask, the search results load properly, but when it's enabled, they do not appear. This problem does not occur in other browsers like Brave.

I have tried:

   Disabling and re-enabling MetaMask.
   Adjusting Firefox's privacy settings.
   Running Firefox in Safe Mode (which fixes the issue but disables all extensions).

Is there a known compatibility issue between MetaMask and DuckDuckGo on Firefox? Any suggestions on how to fix this without having to disable MetaMask?

Thanks in advance for any help!

My license no is : [edited]

Thank you for purchasing the DownloadHelper Video Conversion License for Firefox.

Your personal registration code is: [edited]

If you purchased this license from the browser you intend to use it on, it should already be registered and you should be able to use the product immediately.

Otherwise, or if you want to reinstall your license in your browser, visit that link: https://www.downloadhelper.net/register.php?license= [edited]

You can also use Video DownloadHelper settings: https://github.com/aclap-dev/video-downloadhelper/wiki/V9-interface#validate-your-license-key

You can access your invoice at https://www.downloadhelper.net/show-invoice?invoice= [edited] Best regards,

The DownloadHelper Team

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?

locking as duplicate of /questions/148784 thread

I was using Video Download Helper to download some YouTube videos. Suddenly, it stopped this evening. The button would remain grey. I tried using another LinkedIn video, and it worked, but it did not work with any YouTube video links. I gained access after I got a license 2-3 weeks ago Any suggestion on what is happening with YouTube links

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.

I have two accounts n Youtube and the same video downloader app installed. in the first account I cannot download any video and i get the message "no links ere found". if I switch to the second account in the same video, I have no problem and I do download the video. what can be the solution to the problem?

I installed the extension with the first account which I use as the primary one. at the beginning and for a few months it worked fine and suddenly it stopped working. I didn't do anything. I changed to the second account for other reasons, and I noticed that the downloader works without any problem.

Windows 11 FireFox 135.0 (64 bit) How to pin an existing extension to the toolbar, please ? E.g. Video DownloadHelper. My browser is up to date.

In "Extensions", I select "Video DownloadHelper" then click on the gear icon. I cannot find "Pin to taskbar" there or any where else. See the image for the menu I do get.

Thanks !

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.

Dear Firefox Support Team,

I hope this message finds you well. I am trying to contact the technical support team for the "Video Downloader Helper" extension, which is listed and recommended on the Firefox browser. Unfortunately, I couldn’t find their contact information on your website.

Could you help me locate their support details or direct me to the appropriate resource? I would greatly appreciate your help in this matter.

Thank you for your time and assistance. Arvind Virmani

[edited emails from public]

I would like to be able to download YouTube videos.

Is there a Firefox add-on that will allow me to download YouTube videos onto my MacMini?

I tried Video DownloadHelper and YouTube Video Downloader and didn't see any action.

Do I need to setup settings a certain way to make it work?

What are the steps to make it work?

Thank you for your assistance.

How do I activate the VPN Extension to exclude certain websites? I have added the extension and I already subscribe to VPN but a can't find the Preferences to select a website for exclusion.