1703546 - [Win10] White line on top of the browser while using dark theme and browser is unfocussed

Status: VERIFIED FIXED

(Firefox :: Theme, defect, P2)

Description

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Attachment: white_beta.gif

This was opened on request on bug 1700873 comment 20

Affected versions

• 88.0b8 (20210406185740)

Affected platforms

• Windows 10x64

Steps to reproduce

1. Open Firefox and select the dark theme.
2. Unfocus the browser and observe the top part.

Expected result

• Browser is displayed as expected.

Actual result

• White line is displayed while unfocused, grey line while focused.

Regression range

• Pushlog from bug 1700873: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b3fd546349160dfa293982cace9ba0f289d7788f&tochange=e5ee2e40acc0271d1e6032ab7e6058469cd7eef9

Notes

• Attached a screen recording.
• Also a grey line can be seen when the browser is focused too.
• Firefox Nightly it seems to be fixed see bug's 1700873 comment 13 for more details.

Comment 1

[Ryan VanderMeulen [:RyanVM]]

88 is in RC already, so this is a wontfix for that release. If it doesn't reproduce on 89+, we should wontfix the bug probably.

Comment 2

[Harry Twyford]

This is fixed in bug 1700467! I'll update the tracking flags when that patch is uplifted.

Comment 3

[Ryan VanderMeulen [:RyanVM]]

Bug 1700467 landed for 88.0rc2.

Comment 4

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Verified fixed with 88.0RC2 (20210415204500). The white line is no longer present if the browser is unfocused on Windows 10x64 while using Dark theme. Thank you!