2018563 - Scrolling using the mouse wheel with a dropdown menu open from the Applications > Action will also move the dropdown menu

Status: VERIFIED FIXED

(Firefox :: Settings UI, defect, P3)

Description

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Attachment: 5.gif

Found in

• 149.0a1 (2026-02-22)

Affected versions

• 149.0a1 (2026-02-22)

Tested platforms

• Affected platforms: Ubuntu 24, Windows 11, macOS 26
• Unaffected platforms: none

Steps to reproduce

1. Open Preferences < Applications click on a random dropdown from the Action area.
2. Scroll the page using the mouse wheel.

Expected result

• Scrolling is not possible.

Actual result

• Scrolling is possible, and the dropdown is moved around the page.

Regression range

• Happens after bug 1972076.

Additional notes

• Attached a screen recording.

Comment 1

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

:mkennedy, since you are the author of the regressor, bug 1972076, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[Tim Giles [:tgiles]]

Attachment: Bug 2018563 - Restore popover panel-list hiding behaviors. r=#recomp-reviewers

The panel-list popover now correctly hides itself in the following
situations: scroll that is outside the panel-list, resize and blur.
Additionally, the supportsPopover branch for the hide listeners has been
removed as there are no side-effects from the extra mousedown listener
that is added.

Comment 3

[Tim Giles [:tgiles]]

The changes in Bug 2017668 will fix this as well, closing as a dupe.

Comment 4

[Tim Giles [:tgiles]]

Reopening this bug so that it can be verified as fixed once Bug 2017668 lands in main.

Comment 5

[Mathew Hodson]

bug 2010864 was backed out of beta

https://github.com/mozilla-firefox/firefox/commit/07ddf216d841

Comment 6

[Tim Giles [:tgiles]]

This has been fixed by Bug 2017668 and I'm not seeing the issue reproduce on Windows 11 Fx 150.0a1 (2026-03-12). Setting the qe-verify flag to be 100% sure though.

Comment 8

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Verified fixed with Firefox 150.0a1 (2025-03-15) on Windows 11, macOS 26 and Ubuntu 24. The dropdown is closed after following the steps from comment 0. Bug 2020366 was also verified.