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I have over 100 open tabs spread over 4 Mac desktops. I can no longer access ANY of them after upgrading to macOS Tahoe 26 and installing ESET Cyber Security Pro. I've used ESET with Firefox for many years without ANY problems. But now I have to choose between uninstalling ESET and being unprotected in order to use Firefox AT ALL. Every single webpage is blacked out with the message below. ESET support says that Firefox needs to issue an update to fix this problem.

I signed into my firefox account on my wife's computer and now ALL of her bookmarks, passwords are mixed in with my data. I've signed out of both accounts on that computer. I've signed out and relogged in on my computer. This is not a temporary issue. All of her data is somehow in my account. This seems like a MAJOR security flaw of the software. Were both using Windows 11 computers.

I recently got a new machine and loaded it with Linux Mint 21.3 - Cinnamon, FF 142.0 and Bitwarden Version: 2025.8.2 along with the usual cadre of extensions that I use on every other machine I have.

When I first start Firefox, Bitwarden autofill suggestions does not work, autofill from the "Fill" button in Bitwarden does not work and returns an error. The only thing that works is to individually and manually copy the username, paste it, then copy the password and paste it.

If I log out of Reddit and then try to log back in, the autofill suggestions works and the "Fill" button also works.

This is only on Firefox and only on the fresh start of the app. This does not occur on Chrome and I have not tried (and don't want to try) it on Windows.

Firefox is not saving my passwords. Every time I start up my laptop, all the saved passwords are gone. I have tried a refresh and a new install as well, but the problem persists. I have to sync to my other machine to restore them.

Since the newest wave of firefox updates my icons on startup are gone. When i click new tab they show up again or when restarting the page. I tried reinstalling firefox & changing icons with no help. The previous update before 141.0 had no issues. I tried searching around and didn't find anything helpful. Anyone else have this issue or know of a fix?

I am getting exhausted with Firefox changing my configurations when updating. I always turn off automatic update for all software I use. I even turn off Windows updates. These updates always break something I regularly use and offer me little if anything that improves my experience.

Recently, the update modified my configurations to allow automatic updating. So I had to turn that off. A recent update removed the simple "!gm" shortcut to Google Maps. I had to create a new shortcut for Google Maps so I could type into the URL bar something like "!gm Missouri" to get the map to display. It wasn't displaying before this and returned search results like "General Motors". Ugh.

Can't Firefox stop updating my configurations and making life difficult for me?

I joined a Microsoft Teams meeting through Firefox on the web on a Linux machine. When I tried to share my entire screen, I was asked if I wanted to share the entire screen in a Firefox pop up which I said yes. Then the "you are sharing your entire screen" came up, the sharing icon was red and the "stop sharing" button was red. See attached image. This all disappeared and reverted to the default state almost instantly.

Teams has a feature to "manage what attendees see manage what attendees see" where the meeting host can preview shared content before making it live.

I am concerned that the meeting owner was able to see my entire shared screen without me even knowing it through this preview.

Can someone help? Microsoft just sends you around in circles and I can't contact Mozilla.

So I recently had to reinstall windows, and all the things in my C drive, including firefox, and ever since, things have been acting wonky. For some reason, when I go to specific websites (gog.com, amazon.com, etc) a few seconds after I go to the website on a new tab, a new window pops up, this one acting like a fresh install of firefox (No customized toolbar, no extensions, not signed in on any sites or into firefox) and it has this strange blue border around the whole window (See attached image). This happens on literally every page of these websites, so if I close the new window, go to view a product, or a game, or anything else that takes me to a new web page, it opens a new window after a few seconds. I've been looking for a reason for this, but google was no help, nor were the help articles for firefox. Any help would be greatly appreciated, this is driving me crazy.

Edit: Apologies, it was an addon that was doing it for some reason, despite never doing it before. I'd delete this question if I could.

I've been tasked with removing Firefox from all Windows workstations in our enterprise environment. Our users don't have local admin, so when they install Firefox, it is installed in the user's profile.

I've just installed Firefox 143.0.1 in my own user profile for testing purposes. However, when I attempt to uninstall, either from Control Panel or by running %localappdata%\Mozilla Firefox\uninstall\helper.exe manually, UAC prompts for elevation, even though I installed without elevating.

Is this a known issue? If yes, is there a workaround?

Thanks!

I erased my iPhone and reinstalled Duo afterwards. There is no problem with the notices Columbia U sends to my iPhone to complete a Columbia sign in. But Firefox rejects the codes Duo generates for Firefox sign in on university-owned computers. There was no problem before I cleaned my phone and reinstalled Duo.

???

FIrefox 143 appears to prepend a google link to some links when clicked ... ...

… … and then after a delay load the page with the correct link.

This appears to be something new (or never noticed before) after my MAC OSX upgrade to 26.

Can't tell who's problem it is but it's annoying. Have to try other browsers to know if it's just firefox.

Any insights would be appreciated.

FJohn

How do I stop the attached Newsmax webpage error message that I encounter daily? I am using Firefox on a Macbook with OS Sequoia 15.6.1. This error message requires that I switch to Brave to view Newsmax. This has been a longstanding problem with Firefox which I've posted before to no avail. Can anyone advise what the problem is? Thank you.

I have LOTS of empty bookmark tags and am unable to delete them.

Also your ' Which topic best describes your question' does not apply to my question and I'm sure many others!

When I download firefox, the download automatically shows Bing as the search engine, even if I designate another search engine such as Chrome. I want to delet eBing from FireFox or I will have to use another browser,