Firefox Community Forum

I have had this issue for a couple weeks now with youtube. When running in a private tab it will frequently not accept input for something like 10 seconds at a time. Playback works totally fine, no real stuttering or lag in the video, but pressing pause will generally take significant time to actually pause. This is true of all other inputs including keyboard commands, clicking on links, right click, etc. It seems to have a rolling window where inputs are accepted because if I wait for clicking play to work I can also quickly change the volume or right click a link. It'll even accept the input if I'm in a different window (like if I hit play then click over to my second monitor). This doesn't seem to happen in a normal window, only private. All other firefox tabs work totally fine with none of this lag, nor do I see any other issues on my computer. I haven't noticed any spikes in hardware usage nor am I using anywhere near all of my PC's resources.

I'm only running 2 extensions I think would interfere here (ublock origin and enhancer for youtube) and I've tried running with them disabled to no effect. All my extensions are up to date, as are my browser and OS, this has persisted through restarts (though it seems to take some time to come into effect after a restart). I've tried disabling hardware acceleration and clearing the cache.

So yeah, no idea what's wrong. It's not like unusable, just really annoying. Thanks to anyone that helps.

So, i have a laptop, with integrated cpu graphics (Intel UHD) and discrete gpu (RTX 3060), first times when i set in Windows settings to use Firefox powerful gpu, it just won't, i tried restarting browser but i forgot that i have opened private tab, so i not restarted browser. So, on any pages like WebGL Aquarium, i have pretty low fps, in comparison to other browsers (like Microsoft Edge or Google Chrome). Then, after i see that tab, i closed it, and after restart i got my fps, but.. still lower than other browsers, on WebGL Aquarium with 30k fishes, Firefox max fps is around 35, but on Chrome is around 70 (two times faster). I found one page that shows gpu that uses for acceleration, and it shows pretty weird information in Firefox. https://kdashg.github.io/misc/webgl/low-power.html So, in Chrome it says like "Nvidia RTX 3060 Mobile GPU", and when i choose integrated gpu for this browser in windows, it says like "Intel UHD GPU", but, in Firefox, on first tries it said same, but when i got discrete gpu acceleration, it says that i have "Nvidia Geforce GTX 980". I was like, what? Where it did come from? This explains why I have a fps two times lower but who will explain to me why this gpu is here? I tried to change all acceleration settings in browser, but when i just disabled any acceleration, still shows GTX 980 what is more weird than if it just shows like nothing or Intel GPU, cause is disabled but still uses hardware acceleration, but no matters if i let Firefox use recommended performance settings or set to use acceleration when is available, it shows GTX 980. I think it's about a bug, or something? I can't say that's Windows problems, drivers, or any other thing, cause, other browsers don't act like this, and i just don't have GTX 980 in my laptop on side with RTX 3060 and Intel GPU, anyone even know that laptop like this exists? Screenshot don't wanna upload here so i decided to place it on imgur. https://imgur.com/pyMZQr0

I keep getting this message- With firefox I get this message: Close Firefox Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window.

I have followed the instructions to resolve this, but none of them are working.

I believe this problem began in 133. I've noticed that if FF is open for a few hours, it starts to develop a very noticeable input lag. For example, if I'm watching a YouTube video and hit an arrow key to advance the video, there will be a couple of seconds before the browser registers the key press. It behaves like a high CPU issue but I do not detect high CPU usage when this is happening. Restarting the browser resolves the issue for a few hours.

This is happening on Windows 11 as well as on a Mac running Sonoma.

I am running Firefox in Windows 7 on a PC. When I start up Firefox, in WINDOWS Task Manager there appear between 20 and 30 instances of firefox.exe of different sizes in the Processes Window. I can End Process on most of them without shutting down Firefox or any of the other instances of firefox.exe. However if I shut down one listed with about 200,000K of Memory (Private Working Set), then Firefox shuts down and all other instances of Firefox disappear. If I open an new tab in Firefox, more instances of firefox.exe appear.

I have never seen this behavior before. I tried uninstalling and reinstalling Firefox, but the same behavior occurred. Is this normal behavior, or should I be concerned?

I have enclosed screen shots from the Task Manager. I also have a Dump File of a couple of the firefox.exe instances, including the large one, if that would be helpful.

Thank you.

I restarted Firefox on my Mac earlier, which I think updated it from 136 to 137. After reopening it, web pages won’t load anymore. They either time out or just load indefinitely without doing anything. I went through the troubleshooting page and tried reinstalling it, which didn’t help. My computer’s firewall is off as well. I’ve tried refreshing it multiple times, and I get a message that Firefox has crashed before it actually refreshes. After that, pages will load normally for a very short amount of time (about 30 seconds) before stopping again. Pages are still loading normally on Chrome and Safari, so it’s only Firefox that’s having an issue. Does anyone have any solutions for what this could be/ways to fix it?

Just trying to watch youtube

Open a video, the little circle goes around for a second or two, and starts playing (but it's not synched with the audio - the video starts playing a second or two after the audio starts playing)

Close all other apps, clear cache, restart, same problem

But I do NOT have this problem in other browsers

Do I have to quit using firefox?

He said its down to some update which for some reason I dont have but in the attached image, he is able to add his own wallpaper in nightly but I am not for some reason. Would love some support

firefox stalls on ubuntu and the OS says it is running but I cannot or don't know how to restart/reset it from the terminal. A reboot of the computer solves the issue but I have to re enter the bios password etc. Is there a simple solution?

when I start firefox, it tells me the old one is running and to close it. i hit the close button and keep getting the same message. I have uninstalled firefox and reinstalled it and keep getting the same problem.

The virtual keyboard on my HP OMNI 10 tablet has begun popping up at every touch of Firefox. This makes it almost impossible to use. Expected/normal behaviour is that when you touch web pages or any app., the keyboard stays out of the way while you move around. When you touch inside a textbox, the keyboard should pop up so you can type. Touch outside the textbox and the keyboard drops down. Now, ( since the start of May 2025 or so, I think), the keyboard pops up every time I touch the Firefox page, anywhere. This makes it almost impossible to use.

For example, on a Youtube video, I touch the video to start playing.... and the keyboard pops up, covering up the video! I have to touch the x to drop the keyboard down again. When I want to rewind or move forward, I touch the video to get the controls to appear and...the keyboard pops up, covering the video. I have to touch the x to drop the keyboard and by then the video controls have timed out and gone away again!

Right now, if I close the keyboard and touch this page outside the textbox, the keyboard pops up.

In Microsoft Edge the behaviour is normal and in an app., like Notepad, the keyboard only pops up if I touch inside Notepad.

By the way, I did all this typing once already but when you said you couldn't read my troubleshooting information automatically, I tried your manual steps, and that took me to another web page. When I came back to this page, all my typing was gone! Very annoying. please don't do that again.

I like firefox...used it two to three times a week for over ten years...Now when I click on the icon on my menu, I am greeted by the ansurb: "That doesn't look right." When I try to download Firefox, it will not down load...why are you idiots doing this to your own product?

I am trying to access iDRAC 7 on a Dell Poweredge R520. On version 133.0.3 I get a An error occurred during a connection to 192.168.1.20. PR_END_OF_FILE_ERROR. I know that the problem is that Firefox stop supporting older versions of TLS. So I choose to also install an older version of Firefox (43.0). On that version I get a The page you are trying to view cannot be shown because the authenticity of the received data could not be verified error. I used to have no problems accessing iDRAC 7. Has anyone else been able to resolve this problem?

Hello,

I am not familiar with how Mozilla Firefox

Two days ago, I had Microsoft Window 11 screen flickering issues. Searching the web for possible solutions, many recommended to uninstall any recently updated apps prior to when the screen flicker issue started. Since Mozilla Firefox was one of the recently updated apps, I uninstalled it but didn't know that I will lose all of the bookmarks I put under browser the bookmark ribbon.

I never saved or exported my Firefox bookmarks before since I thought it will be saved automatically. However, after I reinstall the Firefox app, my bookmarks are gone.

How can I get my Firefox bookmarks back if I never manually saved or exported the Firefox bookmarks before? I really would like to have them back. Desperately need help.

Thanks very much,

KT

i've recently had problems with not being able to login to certain accounts (others are fine) resulting in hanging. other times i might be writing a message (or other) and the browser crashes. can you help me, please?

I recently updated my Mac OS to 15.4, and for whatever reason, ever since I did, Firefox stopped working. I can open it, but if I try to go to any web site it just has a dot bouncing back and forth like it looks like it's trying to go to the site, but then it times out. I have deleted and re-installed Firefox several times - the last one being version 137.0.2 for Mac, but it still won't open any site. I don't know what to do to get it working and Mac tech support had no ideas other than to contact Mozilla tech support, so here I am. Can you help me? This has never happened before and it makes no sense that it would not work. You can see by the enclosed screen shot that it opens, but fails to open any photos or go beyond that. The 'checking for updates' alert just keeps spinning and spinning. Rick Garside

Since updating to version 135.0.1 last night, all kinds of interactive maps have been loading like the pictured attached below. Even maps in pdf aren't properly loading, loading black pages. Everything works completely fine in all my other browsers.

Was prompted for various system updates including apps(Firefox). Performance has been very sluggish. At some points, it feels like I'm browsing on dialup. I have a 1GB connection from my ISP.

Not sure if this is a Firefox issue or in conjunction with the other system updates.