I-Firefox Community Forum

Hello!

I first installed Video Download Helper several weeks ago and it worked fine. However, since the update of 04 March, 2026, it no longer works with YouTube. (It does, however, still work with Instagram.) Having checked all of the settings (which I had/have not changed), I uninstalled it today and then re-installed it. This hasn't helped. With YouTube, the Downloader icon (pinned to toolbar) simply remains grey and does not show any videos when opened. I am using the latest, fully updated version of Firefox with Windows 10.

Can anyone help, please?

Many thanks,

Stuart.

Hi, When I want to open and see most of sites, this extension show me the pop up and message:

Ads Blocker Detected!!!

We have detected that you are using extensions to block ads. Please support us by disabling these ads blocker. Help me please to remove this Ab Blocker. Thank You.

Hi i use java scripts on other browsers and it works normally , i prefer using firefox but Tampermonkey ain't reading it , hardly it works .

is there anyway to keep the tampermonkey java scripts work soft and normal ?

All Regards

I am having a problem with Firefox. Some websites do not load correctly and certain extensions do not work as expected.

I have already tried restarting Firefox and checking my internet connection, but the issue still happens.

Please advise how to fix this problem. Thank you.

I synced my devices, but it only added clippings as an add-on for the second device but the clippings that I have on my first device were not transferred. How can I have all my notes/clippings that I made on one device, be available on the other device?

Hi, I am looking at an add-on for Firefox on addons.mozilla.org. It says "This add-on is not actively monitored for security by Mozilla. Make sure you trust it before installing." Under "More Information", it links to a Github page with source code. When "not actively monitored", does Mozilla at least check that the Github page linked to is what is being installed? The add-on is very simple and so I feel confident trusting the code on the Github page, but in clicking "Add to Firefox", I want to make sure that that is indeed the code I am adding.

Thanks!

Best regards, Nicholas

I’ve developed a Firefox extension similar to the RankingsFactor SEO Chrome Extension, which analyzes on-page SEO elements such as meta tags, headings, links, and canonical tags.

The core functionality works fine in Chrome, but when I ported it to Firefox using the WebExtensions API, I’m facing permission issues while trying to access or read the page content (DOM).

Here’s what I’m trying to do:

Inject a content script to read <meta> tags, headings, and links.

Display this extracted data inside my extension popup.

However, in Firefox, the script doesn’t seem to have proper access to the page DOM — even though I’ve included "permissions": ["activeTab", "tabs", "<all_urls>"] in manifest.json.

I’d like to know:

Are there any additional permissions required in Firefox to read page content?

Does Firefox handle activeTab or content_scripts differently than Chrome?

Is there a specific event or user action needed to grant temporary permissions?

Any help, code examples, or guidance on fixing these permission restrictions would be appreciated.

Hi! I am currently receiving "Fake" pop-ups on my laptop from "McAfee".... but I know they're FAKE notices as I am not subscribed with McAfee. How can I block these pop-ups? Thank you!