Firefox Community Forum

As of 12/9/25, Firefox seems to now prevent Theme add-ons from working if there is a contrast setting configured in Windows configuration. (Version 146.0) Previously, this allowed a very aesthetically pleasing view. I would greatly enjoy having that option again. Thank you.

I've been using Firefox all morning. Now, for some unknown reason, every time I start it up, it immediately crashes Windows. I mean, within 1 second or so. There's no time to do anything. After the fourth crash in a row, I just restarted Windows again. It was humming along happily for 10 minutes or so, and then crashed as soon as I started Firefox. After the first crash, the first thing it did was update, but that didn't fix anything. I'd love to share data with you but I'm forced to use Edge right now.

12/10/25 am my yahoo bookmarks are opaque. they are still there just not visible until you click on them. Later 12/10/25 I rolled back firefox to earlier time and all looked correct again. today 12/11/25 opaque bookmarks again.

Bank Login (a single bank) - This has worked fine for years but now there is a problem. I use FireFox password manager and it contains the user name and password and they are correct. When logging in the user name and password are shown and they are correct but the website says user name or password is incorrect. When I type in the user name it works. Why?

Hello,

I’m reaching out because I’ve been experiencing persistent loading delays on Firefox across all websites. Pages eventually load, but it consistently takes longer than it should or don't load at all, can't even log in on some sites such as Twitch. At first, I thought the issue was only on YouTube, but I’ve confirmed it affects all websites.

I’ve already gone through extensive troubleshooting steps, including: Clearing cookies and cache Changing DNS providers (tried both Cloudflare and Google DNS) Using the Firefox Refresh option Fully reinstalling Firefox Scanning my system for malware (none detected) Verifying that no extensions or add-ons are installed Confirming my internet connection and speed are stable Testing the same sites in Chrome, where everything loads smoothly Despite all of this, the problem persists only in Firefox. Thank you in advance for your support!

I just bought new PC and switched to win11(never happened on win10). Videos stutter when on 2nd monitor and game is open on first, but audio doesn't. Problem goes away immediately when clicking to the firefox window. Happens on both youtube and twitch, but not on Nebula.tv and not on chrome. Doesn't happen if the video is 480p, but does on 720 and 1080 and both of them are 60fps which might be something. Also doesn't happen if the game is windowed, but does on fullscreen and borderless.

I've disabled hardware acceleration (in windows and browser). I've tried setting both monitors to 60hz, setting firefox priority to high (and game to low), disabling effiency mode, setting power mode to performance and tried a lot of other things including about:config settings. Also ruled out extensions.

CPU: AMD Ryzen 7 9700X GPU: RTX5070 1st monitor: 180hz 2nd: 80hz

Firefox prevents going into hibernate mode. It only appears to blank screen until mouse is moved or lid moved. This happened on 3 year old dell and now on new lenovo. I've gotten around it by going into task manager and killing firefox before hibernating. This doesn't happen on a newly opened window. I've noticed that as you use it, in the task manager, (not sure of correct term) the amounts of firefox tasks/threads? increases but does not decrease when tabs are closed. Eventually hibernate stops until I kill the firefox program. I thought this might go away with new lenovo with twice the ram, but happens at same rate. If I forget to kill firefox, I end up with a dead battery. This doesn't happen with edge or other browsers I've tried.

Dear Sir or Madam,

I'm recovering an older Firefox Sync Account. I can login on https://accounts.firefox.com. My password is valid. I cannot login within Firefox (activating Sync). It simply does not continue - After entering the E-Mail-Address and clicking the Button "Sign up or sign in". The browser network debug show no (obvious) communication error.

Please advise.

Kind Regards, Stefan

For whatever reason every time 'Firefox' browser goes down my email shuts down also. This did not happen prior to trashcan Win!!(recently installed). It's a pain in the ass having to reactivate 'Firefox' then contact my email server to reactivate my email service. Any assist is appreciated. TangoYankee in advance.

If I go to the profile folder, exit firefox then copy and paste the folder to a backup location. The attempted backup fails. Something about permissions as I recall. I have tried many things unsuccessfully. Something has changed that does not allow for the backup of profile folders. Adding a backup option to the profile manager would be nice. I noticed some people have found work-arounds but I need a straight-forward procedure for backing up my folders. No work-arounds please, just a simple procedure. May I ask for help with this issue?

The email address in the account recovery option is incorrect. I cannot locate any option to revise it. Correct address is: GHUGHES204@gmail.com. The INCORRECT email address is GHUGES204@gmail.com. How can this be corrected?

One day there are no shortcuts on my firefox homepage, none show up when I open a new tab. In my settings, it shows I have set to allow 3 rows of shortcuts, but there are none! This is so totally inconvenient and I have spent hours trying to sort it out, so I might be bailing on Firefox as my default browser.

Some google search suggestions mention "clicking on the plus sign" to add a shortcut. THat opens a new tab but does not relate to shortcuts.

This is a snip from my Chrome homepage, with shortcuts. I used to have 3 rows in Firefox. Now there are none, and there is no plus sign to add one.

HELP

i bought a GMKtec K12 Mini PC AMD Ryzen7 H 255 (Upgraded 8745HS) Oculink Support DDR5 and youtube videos at 4k 60 hz stutter big time when i log in to my youtube acount.i am a premium user.all driver are up to date.my intel laptops using firefox browser work perfect no frame drop whatsoever.i have bought 2 of this mini pc and bouth behaving same on firefox(i tried on all firefox browsers: F.NIGHTLY,FOR DEVELOPERS,ESR) I also have an laptop with AMD cpu and behave same: stutters on 4k 60hz. Recently i tried FLORP browser and youtube 4k 60hz works perfect until i log in to my youtube acount and then it starts stuttering and loosing frames big time so bad i even cannot watch the video.ive tried on trubleshoot mode ,started from scrtach with same results