After sometime it slows down

[paniabhisek]

I did not encounter it before. Maybe the latest install.

It happens on youtube.com. The video plays fine, but when I move my cursor to the time bar, it lags. It also lags when I fast forward the video. I did not encounter in other pages. I might be wrong.

Mullvad Browser version: 14.0.4
OS version: Ubuntu 24.04.1 LTS

[paniabhisek]

I think it has to do with me suspending the system. It happens after that. I found some issue in another software which I filed here. This might help in debugging the issue!

[rado84-github]

There are also two other lags which I believe might be related to what paniabishek describes, only in my case it doesn't matter whether I've suspended the system to RAM (sleep) or not - mostly because I have a workaround to restart the nvidia driver upon resuming (waking the system up).
In my case typing messages on FB become really laggy at certain point. For instance, this whole sentence would appear in about 5 seconds after I have finished typing it and you can see the characters appear slowly one after the other, as if I'm using the first computer by John Atanasov.
The other lag appears when hovering overing the reactions bar and trying to choose a reaction to a post. The appearance of the reactions bar looks as if it's happening with 10 frames per second, not the 60 FPS which my screen has.
These two lags happen ONLY in mullvad browser. They don't exist in the regular Firefox.

I enabled gfx.webrender.all in about:config in order to see if that would fix the lags but it didn't.

Mullvad browser: 14.0.5
OS: Arch Linux (6.12.10 rolling, nvidia 570.86.16-2)

Note: I do not know if these lags I've experienced happen on other pages because I'm using mullvad browser for Facebook only, due to the laziness of my ISP's sysadmin.

[zkisaboss]

Report these issues to Firefox, as they develop the browser engine:
https[:]//bugzilla.mozilla.org/home

The YouTube lag issue was fixed in Firefox 134.0.1. If this fix is added to the ESR version, Mullvad will include it in the next release.

[zkisaboss]

Note: I do not know if these lags I've experienced happen on other pages because I'm using mullvad browser for Facebook only, due to the laziness of my ISP's sysadmin.

When you tested, were you using Firefox ESR or Rapid Release?