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STOP STOP STOP STOP STOP STOP STOP page reloads after losing and regaining focus! This bug makes it impossible to use FF for any tasks that require external authentication and is simply incredibly annoying!

If I try to open Firefox, it goes to a page saying my fingerprint will be required, but nothing asks for my finerprint. And the red close button on upper left doesn't appear. I can only reduce the picture, but can't close it to start over.

Second time asking for help: Firefox "hangs" for 30-60 seconds the first time I open it on my MacBook Pro. Am running Firefox 148.0 (aarch64) on Mac OS Tahoe 26.3.1. This has been going on for three months. Have tried uninstalling Firefox and using AppZap to erase my Mozilla profile from the Mac -- rebooting the Mac -- and re-downloading a fresh copy of Firefox. I shut the Mac down for about an hour, rebooted, and Firefox launched right away. But the next time I launched Firefox on reboot, it "hung" again. Spinning beach ball for about 45 seconds before it then opened its default page at open. I do not run a VPN, and disabled some Safe Browsing "features" of Intego Virus Barrier.I tried to eliminate any other third-party extensions from my Firefox that might cause the delay. Am attaching an image of the extensions Firefox currently uses on the Mac. I absolutely <loathe> Safari, but can't have my Mac use Firefox as a default browser if it "hangs" on first launch. One last thing. Early on in the process, I tried deleting my Mozilla Firefox User Profile, but Firefox refused to start because it couldn't find a profile to launch with. So did not go there on this last attemt. Thanks in advance.

OS info: xiaomi hyper os 2.0.211.0.VOPCNXM, Android 15 Kernel version: 6.1.118-android14-11 firefox version: firefox beta 149.0b3 (Build #2016146927), ebd9b883ad2f97d5a0f74e1546d2164fa61219b1 firefox 148.0.1 (Build #2016146751), 5b55fb779793ef4e5bae65dc9c7fcac619e3fd43 issue description: screen freeze in blank after resume from background, page will load 8s later I can touch other widgets during the blank time, but page can't work properly even manually reload it

I have around 60 tabs open accross 5 windows, and whenever I try to open a new tab, Firefox takes many minutes to load completely. I've restarted Firefox and the problem is solved for a few days, and then it persists. I've been using Google, but I want to keep using Firefox. Fix it now please.

I'm elderly,so bear with me. Firefox very often slips off the screen or simply vanishes.Often it disappears to a thin,gray line at the bottom. Can't open a document and have Firefox available,too. I'm 84....are my fingers worn out? Dave P.

If I am on a website that is still loading in Firefox and want to change to another URL, then Firefox does not stop loading the old page. Once I click the "X", then it loads the new URL webpage. Shouldn't it stop getting data from the old URL the instant I load a new URL?

在 Firefox 内部：

通过 JS 触发的新页面 通过 a.click 触发的新页面 甚至 rel=noopener 都会被标记为：

“related browsing context”

进而共享同一个进程，新页签因为内存占用过高，导致旧页签卡死。

通过设置

1. 添加 COOP 响应头 add_header Cross-Origin-Opener-Policy "same-origin" always;也无法解决

设置空白页再重定向也无法解决

I received a scam (verified by Apple) that my credit card was used for an Apple Store purchase. Now, that link is stuck on Firefox and I can't do anything without dialing their support number, which I am reticent to do. So, Firefox is unusable for me now. I tried to restart my iphone, to no avail.

Initial performance is good, but over time especially when tabs are opened and closed frequently responsiveness to user input (e.g. tab switching, opening/closing tabs, response to hyperlinks) becomes very slow. After force quitting and restarting, performance is good again for some time. I exclusively use private tabs.

I love Firefox and NEVER use Safari. I thought something had happened to my MacBook Air, stuck space bar or maybe even a virus? BUT the space bar issue doesn't occur when I use Safari. The issue is this: I will use Firefox (for everything). All of a sudden, the space bar becomes "engaged" and my text starts scooting across with spaces between it. I can hear it "stutter" a sharp sound each time it lurches along. I can then open up a word doc and the thing follows me there. Or when trying to close an unsaved word doc to prep for closing the computer. I restart the computer and to begin with, the spacebar issue is resolved but before long (sooner and sooner) it begins again to the point that I am restarting my computer now within about five minutes. I have uninstalled and re-installed Firefox to no avail. BUT, I can use other programs without problem as long as the problem hasn't already begun again, via Firefox. What on earth? I am now stuck using Safari... I have the most recent Firefox installed. I just re-installed the program a second time, yesterday. I don't want to open the program or I'll end up turning it off and on again and lose all of this but it was updated as of yesterday but I keep up on all the updates, all the time. It's been going on...about 4 weeks? But it started with occurring maybe once a week, then once a couple days now to the place it is multiple times to constant, during a day. I cannot use Firefox until this is resolved. Thank you for whatever help you can offer. I've run the diagnostic /first aid stuff to no avail through my utilities.

Hi, for about the last week (23 Feb 2026) when watching videos in my Firefox Browser, there are short stutters. First noticed in Youtube, so looked for updates to UBO and other extensions. Then noticed the same thing in BBC iPlayer and my4 streaming. It also happens when watching my media via Plex in the browser. It is not my network bandwidth or speed.

When I watch media via my Plex app or videos on VLC media player, there is no stutter.

I have included a link to logs recorded in Firefox profiler as suggested by someone on Reddit. firefox_profiler_2March26 https://share.firefox.dev/4b4moC0

I don't know if this is caused by a Firefox update, a Windows update. Laptop: Asus ROG Flow X16 (2023); Intel i9-13900H, Intel Irix Xe; NVIDIA RTX 4070 (mobile) Firefox 148.0 (64bit)

All drivers up-to-date. Please let me know if the link does not work - my first time trying to upload a link from profiler.

Thanks all.

I've noticed in the last few days that I'm periodically losing keyboard character input on sites following the update to the latest version - 148.0 (64-bit) I thought it might be a power issue with my WiFi keyboard and swapped out the batteries but the issue has persisted and I haven't experienced it when testing in Edge and nor have I seen it when using Excel or Notepad++ which I use regularly. Keyboard input actually froze for 4-5 seconds in inputting the last sentence. The problem is presenting on a number of sites - e.g. Reddit and YouTube. I do use the Ublock Origin extension but have been doing so for quite some time. I did report an issue with the mid screen search bar a few days ago and believe that is to be corrected in the update of 10th March. Is this also a known issue with the update?

Most times when I go to a new page via a link, I go to scroll down on the new page but the page refreshes with the circle up top instead. I have to cancel the refresh with scrolling upward to cancel the refresh before scrolling down to view the content. Its a very annoying bug and I bet alot of users are having the same issue too.

Thanks