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Very slow browsing when using UXA hardware acceleration

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Operating system: openSUSE Linux, Tumbleweed, KDE plasma 5, updated Hardware: Dell Inspiron 5558 with intel and nvidia graphics (optimus laptop)

I was "forced" to use UXA acceleration (edited /etc/X11/20-intel.conf) because of another issue with another application. That issue got fixed but at the same time firefox is very slow now when browsing (especially scrolling) and especially when watching youtube videos (complete freeze)

Enabling/disabling hardware acceleration from firefox preferences doesn't improve the browsing

What can I do??

Operating system: openSUSE Linux, Tumbleweed, KDE plasma 5, updated Hardware: Dell Inspiron 5558 with intel and nvidia graphics (optimus laptop) I was "forced" to use UXA acceleration (edited /etc/X11/20-intel.conf) because of another issue with another application. That issue got fixed but at the same time firefox is very slow now when browsing (especially scrolling) and especially when watching youtube videos (complete freeze) Enabling/disabling hardware acceleration from firefox preferences doesn't improve the browsing What can I do??