1678902 - Glitchy Min/Max/Close buttons on Windows 8.1

Status: RESOLVED DUPLICATE of bug 1677696

(Core :: Graphics: WebRender, defect)

Description

[root_pfad]

Attachment: 2020-11-22 10-58-27t.mp4

User Agent: Mozilla/5.0 (Windows NT 6.3; rv:85.0) Gecko/20100101 Firefox/85.0

Steps to reproduce:

Firefox Nightly 85 (2020-11-21) (Didn't appear exactly in this update)
No steps to reproduce, always is present.

Actual results:

Min/Max/Close buttons are either invisible or are only partly visible.
Invisible when Firefox is not the active window.
Part of the minimize button appears when scrolling, sometimes flickers.
Buttons still work.

Expected results:

Min/Max/Close buttons should be visible.

Comment 1

[root_pfad]

Steps to reproduce with a new profile:

1. Enable Webrenderer in about:config.
2. Switch to Alpenglow theme.
3. Restart Firefox

Doesn't occur with the Default, Light and Dark themes.

Comment 2

[Peter Magyari (Desktop QA)]

Hi,

This seems to be an issue with the Theme not Firefox itself.
Could you check if this issue also occurs with Webrender off?
(gfx.webrender.force-disabled set to true)

Thanks!

Comment 3

[Darkspirit]

Thanks for the report! According to bug 1677696 comment 8 this bug occurs on Win7 and Win8.1. It's fixed by backout in Beta, it will be fixed in Nightly within the next days. Win8.1 is also affected by bug 1673572.