1954341 - Tab group briefly uncollapsed at original position when dragged to start/end of tab bar

Status: VERIFIED FIXED

(Firefox :: Tabbed Browser, defect, P1)

Description

[tabmix.onemen]

When dropping group, by dragging it label, before first tab or after last tab, the group un-collpased in its old place for a split second before it moves to its new position.

tested on latest Nightly with clean profile

Preparation:

• open multiple tabs
• create group, make sure to have more non grouped tabs
• move the group by dragging its label

Drag:

• group is collapsed while dragging as expected

Drop:

• when the drop position is start/end of tab bar, the group is visible again in its original position for a split second before it moves to its new position.
• when the drop position is other then start/end of tab bar the group immediately appears in its new position.

Comment 1

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

:dao, since you are the author of the regressor, bug 1908439, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[Dão Gottwald [:dao]]

Attachment: Bug 1954341 - Disable tabdrop-samewindow transition for dragged tab groups. r=dwalker,jswinarton,sthompson

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/4c75c7be8565
Disable tabdrop-samewindow transition for dragged tab groups. r=sthompson,tabbrowser-reviewers

Comment 4

[Narcis Beleuzu [:NarcisB]]

https://hg.mozilla.org/mozilla-central/rev/4c75c7be8565

Comment 5

[Rares Doghi, Desktop QA]

Verified as fixed in our latest Nightly 138.0a1 (2025-03-26)