Firefox Community Forum

Hi. Recently, a old issue has comeback on my firefox. When I load youtube video, or a twitch livestream, at 60FPS, and I scroll down the page, the scroll "lags" until the player is off screen. By lags i mean it slows down the scroll and is no longer smooth. This is an issue I've had before and had successfully dealt with by accessing about:config and turning media vp9 off, but it has returned fairly recently, since I do not remember this issue happening before the last week, maybe two. Another issue, also on youtube, is that when I scroll down through shorts, sometimes after a couple of videos, the browser will visually freeze entirely, but will still allow me to click things on the page and also play sounds. After about 20 or so seconds, it will unfreeze and work normally.

I understand that this issue, atleast the 60fps scroll lag, has been an issue for a while and I have tried multiple fixes for it, changing various boolean settings, refreshing firefox, updating my Nvidia drivers to the newest via nvidia app which i should add has never been an issue for the past few months and has worked flawlessly and my nighmarish evening of troubleshooting ended with me completely fully uninstalling firefox and redownloading fresh, but the issue presists.

It should be noted that on other browsers, I have no such issue. Im not sure if mentioning this is some sort of taboo or persona non grata, but i also downloaded and tested Waterfox, and it also does not have this issue. The only band aid fix I found for the moment is that turning off Hardware Acceleration fixes the scroll issue, but it causes awful screen tearing, which is just as bad and distracting.

So to my understanding, 3 potential things are happening. This issue is just in my head Something on my pc is dying and I have a mechanical or software problem Or finally, there is some issue with a recent update, either with firefox or maybe some driver somewhere causing an issue. It just upsets me greatly due to this being a relatively new issue. As stated I have dealt with the scroll lag before and did find a permanent fix, and firefox has since worked literally flawlessly for months/years. But now, somewhere within the last week, maybe 2, something has gone wrong. I hope this gets fixed in an update, or if others have this problem there is a fix. Thank you.

I've just upgraded to V149 and, when using NordVPN, Firefox is now taking at least 30secs to startup. If NordVPN is off startup is instant. Prior to V149, Firefox startup was instant, both with and without NordVPN.

After updated to 149. Tab unloader is totally broken, unloaded tabs won't be discard but hold in shared web processes then reload right away. Extension process ram consumption bloated then cause browser lost response. If it not a hard hung up it would stop loading data from web. And/Or not operate when switch tab. Every action is risking frozen only way to unfreeze is to kill the extension process while risking complete lost of response. Never seen such piece of shit in decades.

Hi, I notice today that Firefox takes a really long time (~30s) to start. The main Firefox frame opens, totally empty, no tabs, nothing... and ~30s after, it starts.

I also notice that it is linked whith the VPN. When the VPN is active : long time, when the VPN is paused, normal start.

I have two computers, same reaction ! The first computer is used every day, so I have the problem on this one since the last update (I suppose).

The second computer has not been used for a week. I started the second computer today , I checked the VPN is active, I notice the first use of Firefox (which was still v148...) was as fast as usual, then Firefox automatically updets to 149.. and restart, and then, same behavior : long time as start.

I tried to go back to version 148, without any better results.

Can you help me please?

Two computer are in W11 up to date, and the VPN is NorthVPN up to date

Regards Alain

I am on arch linux, Wayland KDE Plasma. KDE Plasma Version: 6.6.3 KDE Frameworks Version: 6.24.0 Qt Version: 6.10.2 Kernel Version: 6.19.9-arch1-1 (64-bit) I then ran firefox (Both Flatpak and Pacman fail ), and no matter what (MOZ_ENABLE_WAYLAND on or off) when in pointer lock, the high polling rate mouse was significantly slower than the lower polling rate touchpad. I have tried different mice with high polling rate, the result is the same. https://mdn.github.io/dom-examples/pointer-lock/

Lately I can not click all of my browser tabs, only some of them unless I do not have the browser maximized on the screen. If I make is smaller then I can click all of the tabs. Since the recent Firefox update I can't find a hardware acceleration setting to toggle off to see if it helps.

The window is not coming, up. shut it down with task mgr. Deleted xul.json file and it worked for a little while. but broke toady. Windows update done andn restarted.