Hi everyone ! I've experienced for almost as long as I can remember (?) on my machine (KDE Neon + Nvidia + Firefox) major performance issues. I'm using KDE Neon + NVIDIA GTX 1060 + latest prop drivers from PPA + tearing workaround (GL_YIELD)?

I'm asking if some of you gals/guys experience it too to check whether it's a general or configuration or KDE related issue ? (Breeze GTK ? Kwin ? Some anti-tearing workaround side-effect ? NVIDIA ? Or libs in 16.04 and used by KDE ?). My problem occurs equally with accelerated layers enabled or disabled.

First, if I just use Firefox normally, everything seems fine. But :

- quite quickly, when I watch quite a few YouTube videos in a row, FF gets progressively less & less responsive. i.e. : after one or two hours, it can take one or several seconds to switch between tabs ! (until I restart FF)

- this is more specific but I sometimes watch the live HD stream of French TV channels (like France 2). After about 30 minutes, even though my connection is perfect (fiber), the video stops due to buffer underruns. Reloading the page is not enough. I have to quit and restart firefox.

Edit by moderator: removed link

Sounds like a Firefox issue to me, did you search the web for this? I don't think this is the right forum for this question.

FWIW: using KSysGuard to monitor where your free memory is lost would be a first start to know what is wrong. One culprit that immediately springs to mind is Flash, this is usually a terrible ressource grabber, try avoiding flash in Youtube (you can set Youtube to use HTML5 only in its settings)