1919041 - Rapidly toggling sidebar causes it to move and reveal desktop during animation

Status: RESOLVED FIXED

(Firefox :: Sidebar, defect)

Description

[Kestrel]

Attachment: Spamming sidebar flashes desktop on Ubuntu

STR:

1. Start with sidebar.revamp = true on Ubuntu 24.04.
2. Click the sidebar toggle button rapidly.

Expected:
Sidebar content remains stationary and does not reveal desktop.

Actual:
Sidebar content temporarily moves and reveals desktop behind window.

On Windows 11, the sidebar content moves but does not reveal the desktop.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=aa6305a65fb5e7e7a9a1c0b572cdb0e2d4dac4fc&tochange=05fe9b71651f981ada58733864135b940f9c27b0

Regressed by Bug 1915230.

Comment 1

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

:emilio, since you are the author of the regressor, bug 1915230, 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)]

Attachment: Bug 1919041 - Handle interrupting sidebar animation. r=#sidebar-reviewers

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/8970122c7831
Handle interrupting sidebar animation. r=sidebar-reviewers,kcochrane,sclements

Comment 4

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/8970122c7831

Comment 5

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

Set release status flags based on info from the regressing bug 1915230