Firefox Community Forum

First post. Not really a question.

I noticed last week that some pages didn't load, and Activity monitor showing Firefox app using 170-180% which I know is way too high. Forgot to check memory usage.

I rolled back from 154 to 153 by restoring it from backup, and same with the Firefox folder in ~lib/appsupp/, relaunched Firefox and cpu was back to 2-4% cpu with a couple of windows and tabs. I've turned off auto-updates.

On my system, something is wrong with v154.

Mac Mini M4 Pro 12-core 24/512, macOS 15.7.5.

A week ago, Firefox started freezing and acting all glitchy. Troubleshooting said to uninstall and reinstall, which I did. That's when the real trouble began. It lost all my data, pretty much signed me on as a brand-new user. Luckily, I was able to recover my data from my phone app, but it still did not work correctly. Nothing in the support pages was helpful, so I finally had ChatGPT assist. We got it restored using my recovery key and I though that everything was fixed. Then two days ago I got the 'not responding' thing happening every time I tried to reopen it, along with a generic Firefox web page opening randomly. I reopened it several times in troubleshooting mode, again, no help. So. uninstall, reinstall, uninstall, reinstall... you get the picture. I finally thought I had gotten it properly restored at 5:30 this morning with all my previous tabs showing up. But as soon as I tried to use it, the same old 'not responding' message. I always get the pop-up asking me if I want to close it or wait for it to respond, which it will eventually do, until I try to click on a tab. What the hell am I missing here? I've had Firefox for, oh, I don't know, 20 years or so. Never had problems.

Whilst on various websites, reading articles or even on Gmail, Firefox takes me off them and takes me to Recent Browsing and I have to click on the website from there - this happens frequently.

Hi folks My configuration: MacOS Tahoe FF 15.4.0 When I relaunched FF after restarting the Mac, in the Windows menu all the pages from the previous session were listed but none appeared when I tried selecting them. They must be hidden somewhere. I tried several work-arounds. The one that gives a result is by selecting in the View menu the Enter Full Screen item, then try to go back to a normal view which is a pain in the neck. Is there a clean method to make all those windows come back to their normal position and if possible preventing FF from doing this in the first place? TIA Nick

Hello

I have Firefox 154.0 on my 2 PCs that have Windows 11 and both computers are updated fully as of 22nd August 2026 with both Windows updates and Nvidia drivers.

Background: On my 2 PCs I have an "old" stationary PC with Geforce 1070 TI card, and I have a laptop Asus Vivobook 15 PRO with a Geforce GTX 4600 card. Both computers working fine and no issues so far.

Symptoms: I updated Firefox. Note! I always update Firefox on my computers, so it wasn't a clean install of the browser. And suddenly on both computers there were black artifacts all over screen and flickering when scrolling on Facebook or Youtube. Also even worse on sites were you drag a div and the browser turns into a 1-bit disco.

Workaround that seems to be working for me: I went to about:settings and searched for hardware on my laptop (the one with 4600 card) and searched for "hardware". Then I disabled the hardware acceleration thing, or whatever it was, but unchecking the result after search. Then I restarted my laptop not using hardware acceleration and it worked fine.

Then again I search about:settings for hardware and checked the bottom of the 2, not sure what the first one was. And restarted computer.

Now I don't have those black artifacts and flickering any more.

Not sure if that somehow triggered something that works for fresh installs or not.

Anyway... I can't submit a ticket since I can't reproduce the error it's no point submitting to Bugzilla. But hopefully this makes sense anyways... But I'm pretty sure you guys are aware of this issue already. But posting anyways in case it might help.

If my computer idles for a long period of time, Firefox doesn't recover at all. If I leave a website open, Firefox won't let me go back into it. I need to close Firefox, wait 10 seconds and open it again to open any website.

I am running 10 or more tabs with tradevision.io showing real time stock charts running multiple 1-minute charts forcing my CPU/GPU to constantly render live data. Enabling Hardware Acceleration in your browser settings can help balance the load and keep things running cooler but it made no difference. Prices still freeze and I have to constantly refresh. The CPU is flat out and running hot - my laptop is a top of the range xps 16

Why does Mozilla 154.0 always stall after a couple of minutes? It is a hell of a mess. I couldn't place this question without resorting to an older version of Firefox :-[[

Did anybody test V 154.0 anytime, at all?

I unfortunately updated a Windows 10 computer to this version of Firefox.

As such, I cannot provide you with troubleshooting information, because the new browser 154.0 does not work. At. All.

I did all the usual stuff like restarting the computer, the users of Windows OS junk are used to anyway. The Task Manager shows not less than 16 Firefox-processes, with a truckload of memory usage, having opened just one browser tab. Waiting for 20 minutes for firefox to show me the grace of continuing its operation didn't help either.

Any ideas?

u have asked how to stop Firefox from keeping saying firefox id running but not responding. I have gotten some answers but i need to let you know this is what i have in my task manager you will se the photo there is also one at the top plus i have all these profiles the one in bllue now i saw where it said to place.sqlite and rename it old i also took out parent lock and it is still happening all the time so what can anyone k help me stop this

For at least a few months now, my browser will suddenly and randomly go fullscreen all by itself. I can't exit it, and then it goes back to normal after at most a minute. It hasn't happened in at least a week. But today, it froze like that, not responding. I quit firefox, waited a bit, then restarted it. It went fullscreen and froze again. I waited at least 10min and it then went back to normal and responded again. It only happens when using firefox. I've done virus scans, etc, and it still keeps happening. Please help. Thanks.