Comment # 2 on bug 1160994 from Christoph Karrasch

I am on KDE (tumbleweed snapshot 20200113). Correct, Whiskey Lake 3x8 GT2
(Intel UHD graphics 620).

The second laptop on which the same problem occurs is also running KDE
(tumbleweed) and also has Intel graphics (Iris Plus 640).

Basemark score for Firefox 72 (clean profile) from Tumbleweed repo: 270
Basemark score for Firefox 72 (clean profile) from Mozilla: 390

However, these scores might be misleading since not all tests seems similarly
affected - it seems that only the graphics-intensive tests are affected.
Example:

Test 7 (draw-call-test) runs 30 seconds on Mozilla's build and about 8 minutes
on Tumbleweed's build. I could share a screen capture if needed.

As a test, I just installed firefox-esr 68.4.1 from the tumbleweed repo - esr
is *not* affected!