1973335 - Can't reorder pinned tabs anymore

Status: ASSIGNED

(Firefox :: Tabbed Browser, defect, P1)

Description

[Nazar Mokrynskyi]

After https://bugzilla.mozilla.org/show_bug.cgi?id=1944907 it is no longer possible to reorder pinned tabs, dragging pinned tab among other pinned tabs causes it to unpin instead of changing order

Comment 1

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

:nsharpley, since you are the author of the regressor, bug 1944907, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[Monica Chiorean]

I was able to reproduce the issue on Win11x64 using Firefox build 142.0a1(20250623212838), issue reproduces only dragging tab to pinned tabs.
Marking issue as new.

Comment 3

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

Set release status flags based on info from the regressing bug 1944907

Comment 4

[Sarah Clements [:sclements]]

(In reply to Monica Chiorean from comment #2)

I was able to reproduce the issue on Win11x64 using Firefox build 142.0a1(20250623212838), issue reproduces only dragging tab to pinned tabs.
Marking issue as new.

Hi Monica, can you clarify the STR and if it's affecting both horizontal and vertical tabs? Is this only happening on windows? I'm not seeing it on mac on the latest Nightly. I'd also like confirmation that this is on 141 beta please.

Comment 5

[Nazar Mokrynskyi]

It happens to me on Linux, though I don't use vertical tabs

Comment 6

[Sarah Clements [:sclements]]

Thanks for confirming. Also can you verify which bug is the actual culprit with moz-regression. Several related patches landed after bug 1944907.