Firefox Community Forum

My browser is using 2,3 Gb of extra ram it goes away by restarting but comes back in 5-10 min. It occurs wathing twich, i have tried disabling extentsions but it doesn't work. in about:memory the readout is as thoug it is keaping an extra copy of open browser files in ram.

2,511.83 MB (100.0%) -- heap ├──2,301.00 MB (91.61%) -- committed │ ├──2,016.65 MB (80.29%) ── unused-pages/dirty │ ├────230.75 MB (09.19%) ── allocated │ ├─────32.96 MB (01.31%) ++ bin-unused │ └─────20.65 MB (00.82%) ++ (2 tiny) └────210.82 MB (08.39%) -- decommitted

    ├──210.21 MB (08.37%) ── unmapped
    └────0.61 MB (00.02%) ++ unused-pages

Well I am continuing and repeating my question placed in August 2026, where I found that Firefox V154.x stalled in an erratic way that made it completely impossible to use it or to send a crash report. So your suggestion to send a crash report was not very bright or helpful. I deliberately omitted the subsequent updates, to try again after a main version update. Alas, we have the same situation again in V157.0, this time more predictible. The program stalls immediately after trying to open another tab. And again, you can kill the program only by task manager.

The additional question I have, is how to switch off the annoying update message, as long as Firefox is dysfunctional after an update, I'd like to avoid any update under all circumstances. I have to work with Firefox, so it is more than an leisure thing for me, I cannot afford to cripple Firefox by an unintended update.

I had to reinstall the last known working version (153.03) to send this message.

When I watch YouTube videos, Firefox behaves strangely. After a few minutes of watching, I try to scroll to the comments, and then Firefox starts to lag. Scrolling becomes very sluggish, and the entire image freezes while scrolling. The website stops responding, but the sound continues. The only way to fix this is to minimize and then maximize Firefox. Then I can scroll again and the problem starts again. This problem occurs regardless of whether I clear the cache, use an ad blocker, or which screen I'm using Firefox on. Sometimes, one of my screens even freezes and displays stripes. However, this only happens when I'm using Firefox and YouTube. I have no problems with any other applications for exampmple playing games on one screen and let music streaming app playing on the other screen. Even my Cubase 15 work like sweet on booth screens without errors. Why is firefox acting so strange? Firefox never completly stops or closed itself.

Firefox Version 157.0 (64-bit). AMD Software: Adrenalin Edition 26.8.1. Windows 11, version 26H2 installed October 1, 2026 (previous updates also had the same issue with firefox).

I also got some Firefox Updates when i opened it. I was hoping they catched the issue but it seems like the same.

Have a great day :)

As soon as I start browsing short videos in YouTube Firefox freezes and I have to restart it to continue doing anything. It is very annoying. I have Windows 11 (updated) and Firefox is up to date. I don't use a VPN. I have some extensions installed but it happens with or without them enabled. I use Panda Dome as antivirus (It did not happen when I had Windows 10 and Panda) It does not happen with any other video site

This morning, I can no longer download (Save) files to my computer, nor check/change settings in Firefox. Tried all troubleshooting steps to no avail.

If I delete and reinstall Firefox, will I lose all my Bookmarks, etc.? Running version 157.0 (aarch64).

Appreciate any help!

Firefox just automatically updated and now when playing video while not being the selected window (eg watching a video in the background while doing something else) it plays at a noticeably lower frame rate.

I was using my computer today and everything was working fine, when I closed and reopened Firefox it automatically updated, I have changed no settings anywhere on my computer or in Firefox but when i alt-tabbed to a different window while watching a movie after the update Firefox started playing at a low frame rate.

Any idea what could be happening? it seems to be caused by this latest update.

(I have seen posts from some time ago that seemed to be having a similar problem but the solutions from them do not seem to work).

First the laggy, extremely slow issue was just noticed on YouTube. Now I notice it on Rumble and other sites. For now, I have to abandon Firefox and use an alternative browser. I've stayed with you for years. Maybe it's time to part ways. I really like your browser. But, it has become nearly non-functional for me.