Firefox Community Forum

Lately , when accessing some sites , I have been getting a blank screen with a video ad for Pandora Jewelry in the upper left corner. It takes over the tab a few seconds after opening the site. Does not seem to affect most sites (yet). Did a virus scan and a Malwarebytes scan. Both came up clean. Cookies and cache were deleted and the system rebooted. No luck. Tried restarting FF without extensions with the same results. The screen does not allow a screen shot.

Anyone else seeing this? Any clues? I am using Windows 11 Pro.

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Hi! I have extension and user scripts and such. I can make memory reports, but I can't determine anything since there's too much stuff in there that I don't know anything about. Is there a tool to help me point out issues, or is there by chance people looking at memory reports like this on occasion? The reports themselves are 80-100MB within the .gz files. Which are compressed to 5-6MB. Not sure if full are necessary or anonymized reports are enough. Not sure what sensitive info they may contain.

Maybe this is counter intuitive, and/or I don't understand pinned tabs, but is there a way to have pinned tabs visible in the tabs list, instead of hidden.

I find it very inconvenient in a variety of ways.

I followed the directions to reset password. Now what - the screen of "passwords" is blurred. Where do I find my new reset password?

Thank you, Peace, linda

When attemting to sign in to ATT after today's update (11/18/25) I receive a message: an error occured during a connection to oidc.idp.clogin.att.com PR_END_OF_FILE_ERROR. I had no problems logging in prior to the update. Ho do you (or I) fix this?

I live in Northern Ireland which is part of the United Kingdom. The full name of the UK is as follows "The United Kingdom of Great Britain and Northern Ireland". When I select my country as UK, Firefox changes it to GB. Northern Irland is not in GB. Great Britain consists of England, Scotland and Wales.

I've included a gif of the issue. I'm not sure how to "replicate" it.

I have Material Fox Updated installed, and I'm unsure if it contributed to the problem, since I see other threads about this issue as well.

I've tried removing extensions to no effect, so I assume none of my extensions are contributing to the issue either.

This is the message I get when I try to access my Bookmarks: "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem." I have already tried to find out from Microsoft if their latest reinstallation of Office Professional could have caused the problem. They say they have nothing to do with Firefox. How can I get my Bookmarks and History back?

Although set to open previous pages and tabs it doesn't do so, furthermore I must sign in to all e-mail accounts, google, Facebook etc every time I open my Firefox Developer Edition

I have performed every suggested check that comes up when I put this question to the big wide web,but cannot find the solution. Castanet.net will load, but not open any secondary sites on windows 11,but it will on Chrome on my PC. My laptop with windows 10 has no issue. This has been going on for months and I am ready to just "fire" firefox for good.

whenever I switch between applications the menu bar will toggle itself on when I switch back to fire fox before immediately going away after clicking anything in a tab. this is really annoying and nothing I have tried to keep it disabled has worked. its honestly very frustrating. pressing alt does nothing, turning it off manually does nothing because it turns back on and then off when I switch applications. turning off different extensions does nothing either.

out of nowhere my firefox bookmarks no longer appear. I am getting the following msg "'

The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem.

In an attempt to fix this problem, I have done the following:

• closed the browser and re-opened it
• rebooted my computer
• reinstalled my security software
• uninstalled firefox
• Reinstalled firefox

None of these steps have fixed the problem??????

Any ideas would be appreciated!

ich bekomme die auforderung in firefox meinen AdBlock zu deinstallieren mein AdBlock ist aber deinstalliert was will mir diese meldung sagen es gibt auch noch einen AdBlock Plus aber den habe ich garnicht installiert