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I have forgotten the purpose of the green outline around the page's border. What does it do and how to turn on, after turning it off. Thanks in advance. Let me know if this is an extension or some other feature. Thanks, JJE

I recently upgraded FF on this computer and can no longer sign in to my att.net email account, although I was able to sign in on another computer on FF earlier today. I just get an error message and Att can't help...is there a setting that has me locked out? I can also access email on other browsers just not the FF version on this computer.

I get a different UI when I open NotebookLM from google. My pixel tablet uses Chrome and it loads with the standard 3 panels but in Firefox I only get one screen. Everything else works in the program.

Hello! Today, suddenly, a video player disappeared on the Twitch streaming service (see screenshot), but the stream sound is playing. I tried clearing Firefox data and later reinstalled the browser completely - didn't fix the problem. I installed two versions (115.17.0esr and 115.23.1esr) because I thought the problem was an update. Both versions of the browser have a problem. In another browser, this problem is missing, Twitch is working! Operating system Windows 7 Pro SP1. Can you please tell me how to solve this problem?

After the recent bunch of windows updates i started noticing youtube loading much slower and other websites acting strange. Just now i tried to look at a link https://steamusercontent-a.akamaihd.net/ugc/47948470127416586/912CDEE3AD8B94CF3122B7338E89E24C9B6EC29D/

I get "No video support and MIME type found". I have uninstall/reinstalled, checked codex, disabled addons and downloaded Microsoft windows media pack, then restarted the computer.

Nothing seems to work. But i had to reinstall Firefox again because all my tabs would crash after the last reinstall.

We tried 2 different computers, but two different users. Type in the user name and the password and it looks like it will start up, but then returns to the login paged.

This is pretty shady Mozilla.

When disabling only one setting: "Allow Firefox to install and run studies" it wrecks this site whether logging is or continuing as guest:

https://appointment.questdiagnostics.com/schedule-appointment/as-personal-information

Even after logging in and everything running normal, disabling the studies run by Mozilla and a quick refresh breaks the functionality of the page. All cookies were accepted and the sharing of location was allowed. On a fresh, first run, wide open Firefox people. Literally, the only change that was made was unchecking that one box. In disbelief, i tested it over and over.

Why would disabling a telemetry setting, something that should be optional, cause this to happen? Seriously, what could possibly be the reason. I'd love to hear it.

This was the final nail in the coffin to me and this is since the 0.9x days.

(posted from Supermium)

I'm trying to have Google.ca as my homepage, but Firefox won't let me. It keep reverting back to Google.com Please help. Claude Hamel [edited] @gmail.com

Hi.. can you help me.

My Whatsapp QR Code cannot appear after the Firefox update. The QR code is Blank.. i have tried many ways to get the QR Code to appear but fail. Please help. TTQ

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Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release. 143.0.1 Firefox Release

September 19, 2025 Version 143.0.1, first offered to Release channel users on September 19, 2025 Fixed

   Fixed a tab crash experienced by some users caused by DLL injection. (Bug 1872261)

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I keep getting error message "Something went wrong - Retry" when trying to reach an Audacy.com web page at https://www.audacy.com/stations/wccoradio . This does NOT happen when I use another browser (Chrome), but it happens about 95% of the time in Firefox. When I click the "Retry" button, it still gives me the same error message. I tried clearing out the cookies and cache but this did not help. I have attached a screenshot of the error message. Why am I getting this error message in Firefox but not in Chrome, and what can I do about it?

I have had multiple sites ask me to disable my ad blocker. I can't find an ad blocker in my extensions. Badger, which I do have, says it is not an ad blocker! Some of these sites, such as Rotten Tomatoes, are sites I use frequently! Help!

Youtube is nonfunctional on firefox as of April 29 2025. It was all working fine last night, then I woke up to no youtube. It loads the website as a blank screen. Videos can be accessed by going directly to their URL, but no recommendeds load in, no comments section, even the title and channel information is unavailable. I would say none of the buttons work, but there are no buttons to test. It works fine in Chrome still. I know it's not my extensions because I tried removing them all, and it didn't fix it. I know it's not my cache/cookies, because I cleared that too and it didn't fix it. I know it's not on Youtube's end, because it works fine in Chrome. I know it's not an update issue, because I updated my browser and it didn't fix it. Please. I want to be able to use youtube in firefox. Please help me fix this thing. I have attached photos, but I suspect they'll be more demonstrative of the problem than useful for troubleshooting.