1950381 - Grouping indicator outline for dragged tab persists even when it won't create a new group

Status: VERIFIED FIXED

(Firefox :: Tabbed Browser, defect)

Description

[Kestrel]

Attachment: Grouping fails despite indicator outline appearing on dragged tab

STR:

1. Drag a tab over the first tab so that it shows the grouping indicator without it repositioning on latest Nightly 137.0a1 with browser.tabs.groups.enabled = true.
2. Slowly drag the tab to the left so that the underlying first tab moves to second position.

Expected:
Dragged tab loses grouping indicator outline when it won't create a new group when dropped.

Actual:
Grouping indicator outline persists on dragged tab even though dropping won't create a new group.

Only dragging to the right (towards underlying tab) after clearing underlying tab resets the grouping indicator outline.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=7d81a21559b6ea215ae9c163e436c9265ff9cb02&tochange=8e7552d63987c85bac8abde9f91cea1d584905b8

Regressed by Bug 1945788.

Comment 1

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

:dao, since you are the author of the regressor, bug 1945788, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

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

Set release status flags based on info from the regressing bug 1945788

Comment 3

[Dão Gottwald [:dao]]

This should be fixed. Kestrel, could you please confirm?

Comment 4

[Kestrel]

Fix window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=8bc7ddc11e24f2073cc90038635e13a924245c4f&tochange=f13258f18cdf4ec3d99ffaa10479b70a27d85c3a

Confirmed fixed on latest Nightly 138.0a1 (2025-03-06) by Bug 1946339.