Firefox Community Forum

Today Firefox has suddenly started using ~20% of my CPU capacity, causing my cooling fan to run high most of the time. Since I had been running Firefox v.149.latest, I tried updating to v.150.0, but that made no difference.

It's not Firefox by itself (only Task Manager open) but whenever I open another tab with almost any website (including this one) that CPU usage spikes. What gives?!

Details: Running under Windows 10 Pro (yes, I have installed the ESU package, good until thi8s fall) on a Lenovo P1 Gen 2. Currently running Firefox inside a Sandboxie Pro v1.17.4 sandbox.

Please Help! -- jclarkw

I'm experiencing an issue with the latest Firefox update. If I refresh a link/page the browser "spins out" in a rapid endless refresh cycle. In some cases, I receive an error message, "too many requests," and in other cases, the browser "locks up" and quits responding at all.

Is this a known issue?

Vince C.

FF can take 30-60 seconds to render ANY page after waking the computer from sleep. Windows 11 fully up to date. I've taken a profile during this time and you can see memory cycling up and down about every 5 seconds but I'm unclear what else I'm seeing there. I also see very little network traffic in the profile. I typically have 6-7 tabs open, and other programs on my computer, e.g. email, are not showing this lag.

https://share.firefox.dev/4tz810z

Kubuntu 24.04 with various Firefox iterations including 149.0.2. It happens on stand alone, snap and flatpak versions. I do not know what triggers this problem. As far as can tell it only occurs on Wayland and not on 'X'. .... After using Firefox normally for a while I first notice the problem when I can't click into the separate search box on the toolbar, then I find I can't drag the tabs around as per usual. Then, if I click on a toolbar icon it does not respond. In summary, the toolbar becomes inoperative. I do have 9 pinned tabs but I can often have many more standard tabs up before I ever notice the problem and, today, when it occurred I only had 3 additional tabs up. So, I can't tie the problem to the number of tabs.

I noticed in the past day that Firefox started using alot of ssd. It wasn't doing this before, I've been a Firefox user for years now. I'd like to stay that way rather than going with Google or Microsoft. I don't trust some of the other small companies with browsers. I like the fact that Firefox uses it's own engine too. In the last day it started using alot of disk for no reason. How do I fix this. Well, well, well. I just noticed that Icloud from Apple was using alot of disk too and when I shut it down in task manager it stopped. Firefox disk use is virtually none just like Microsoft Edge. So it's some kind of interaction with Icloud that is causing that. But it wasn't doing that before. I have task manager open most of the time to catch stuff like that. My system is decent I have a 2TB 990, 2TB 980, and a 2 TB 860, with and AMD 5800x, 32 GB of ram and an Nvidia rtx 470. Maybe some kind of backup with Icloud was happening, that isn't with Edge. So I know shutting that off works. Icloud is useful for backing up things from my phone though.

When I switch tabs from Google Maps to something else and back again, my browser often freezes and I have to restart Firefox. This also happens with websites that integrate Google Maps. I tried switching off several extensions, but the problem persists. It never happened to me on older Firefox versions. Is there any solution to this?