Setting `layers.acceleration.force-enabled = true` also works around it
for me.
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https://bugs.launchpad.net/bugs/1812394
Title:
Video playback faintly shows applications behind active
I'm running a fresh install of Ubuntu 18.10 with an RX 580 graphics
card. Here is my driver info:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X] [1002:67df] (rev e7)
(prog-if 00 [VGA controller])
Public bug reported:
Ubuntu desktop 18.10, Mozilla Firefox 64.0
To reproduce:
1. Open any application (such as Nautilus file manager, or the terminal
emulator)
2. Open Firefox above this application
3. Begin video playback (I've found that it's easier to notice this bug when
the video is a