Firefox Support Forum

why is FireFox 95 opening multiple windows on startup with Windows 10, Roboform, & Norton 360? FireFox is set to open a new tab, not new windows, so I do not know why it is doing this? I see lots of people asking this question, but there is no guidance online. What is up? This is causing FireFox to use way too much resources, and slows the computer.

Firefox (and chrome, but not edge) crashes on startup. There's no crash report. The window shows up as an outline for a fraction of a second and then is gone. It doesn't show up in task manager. I've uninstalled and reinstalled multiple times. I've updated windows and my antivirus. I've tried a few other fixes that came up from searching for a fix, but so far nothing has helped.

Firefox will start once (maybe) and then it makes no difference where I click from (tray, programs, desktop shortcut) Firefox refuses to boot up. I've tried re-installing multiple times. If I reboot, it will start. Also sometimes I will get a New tab but the page/URL never comes up. Firefox just hangs. I'm running Windows 11.

I have stated this issue once before after trying to find a solution by myself.

My query: https://support.mozilla.org/en-US/questions/1363376

Whenever I boot up my laptop, firefox starts running in the background taking up a lot of memory space and cpu utilization. I have been with ffirefox since I started using laptops which is 7-8 years back. I never thought of switching browser or finding an alternative of firefox until for some months the issue is occurring. Now I am really annoyed to open up task manager every time and close firefox which is running in the backgroud. I have seen nothing unusual in the "about:performance" tab of firefox.

Please help me to continue my journey with firefox.

So I got on my computer today, and I tried to open Firefox, but it wouldn't open, I would get a loading icon on my cursor and then nothing. So I restarted my computer, same issue. Reinstalled Firefox, same issue. I then reinstalled after having deleted the %appdata% folder for Mozilla, but that also changed nothing. So I looked in Task Manager, and it would just open instances of Firefox as a background app no matter how many times I clicked. I've also tried using other browsers with no success. (Also, I'm runnning Windows 10, 64-Bit version, and had not installed any programs recently before Firefox stopped working.) I would greatly appreciate if I could get some assistance with this because I prefer Firefox much more than Microsoft Edge which is the only browser I'm able to use right now.

In the last few weeks FF has started running really slow. Launch takes 4-5 minutes, the browser won't navigate to any webpages. Preferences can't be opened. The force quit window show the app to regularly moving in and out of a "not responding" state. I had version 95.0.2 installed (the latest). I'm running OSX 10.15.7 (catalina). I uninstalled an reinstalled 95.0.2 and the same problem persisted. I downgraded to 94.0, and created a new profile in the process, and still had the performance problem. Chrome and Safari don't have the problem, and my machine is running as expected with all other apps. I don't have any sites load upon launch. I have 16G of RAM.

Since I can't open prefs, I can't purge caches or anything like that.

My laptop set-up is practically identical to that of my PC, but the latter doesn't exhibit the same malfunction.

I've tried anything I could, including reinstalling the browser, removing all of my bookmarks (about 10,000) and addressing extensions (Decentraleyes, Default Bookmark Folder, Disable Tab Detach, Flagfox, I don't care about cookies, Keepa, Notifier for Gmail, Privacy Badger, To Google Translate, uBlock Origin, Undo Close Tab, Video DownloadHelper and Youtube's Annotations No More), but not even safe mode improved the situation in the least. Windows Defender also hasn't detected any malware and my web surfing habits are as safe as it gets.

The only deeper data I could gather is that the problem manifests with a progressive, rapid surge in CPU and RAM usage; the former, for example, is saturated to its total 16 GB in a matter of about 20 seconds.

My laptop is a Dell Inspiron 7586 with Windows 11 64 bit; Firefox version is the latest, 100.0, and, by the way, none of the recent updates has improved the situation.

Thanks to anyone who might come up with an educated guess!