1955168 - In the Dark / Light theme, respectively, light or dark background is momentarily displayed the first time menupop is opened

Status: NEW

(Firefox :: Menus, defect, P3)

Description

[Alice0775 White]

Steps to reproduce:

1. Open menupopup from Menubar or Contextmenu

Actual results:
Light background is momentarily displayed when menupop is openedin Dark theme. (Screencast: https://youtu.be/urZc12YKPyU )
Dark background in Light theme. (Screencast: https://youtu.be/cnzPx_KPjfI )

Expected results:
The background color displayed should be matches the theme

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=d94bb6e69a16d45c8308abb62c063118d1232c49&tochange=025a26c34be0266ae84b2c61c76a6f752916e15b

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

:emilio, since you are the author of the regressor, bug 1953636, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[Emilio Cobos Álvarez [:emilio]]

Yeah so this I'm aware of... What I think is going on is that the window is temporarily, from the point of view of DWM, inactive (or something along those lines), but I haven't so far found a way of fully preventing this.

Maybe we can cloak and uncloak the window soon after, or so, but seems it would ideally not be needed...

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1953636