1957642 - The tab hover effect is not in the correct position after middle-clicking a link while the tabs overflow

Status: RESOLVED DUPLICATE of bug 1856674

(Firefox :: Sidebar, defect, P2)

Description

[Alexandru Trif, Desktop Test Engineering [:atrif] [PTO 18-22]]

Attachment: hover_position.gif

Found in

• 138.0b1

Affected versions

• 139.0a1 (2025-04-01)
• 138.0b1

Tested platforms

• Affected platforms: Windows 10x64, macOS 12
• Unaffected platforms: none

Preconditions

• sidebar enabled
• vertical tab enabled
• sidebar placed on the left side
• expand on hover enabled

Steps to reproduce

1. Open ~30 tabs.
2. Scroll down and select a tab near the bottom.
3. Middle-click a link from the selected webpage.
4. Move the mouse over the sidebar launcher

Expected result

• The hover effect is where the mouse is.

Actual result

• The hover effect is above the mouse.

Regression range

• I will search for one ASAP if there is one.

Additional notes

• Attached a screen recording.

Comment 1

[Sam Foster [:sfoster] (he/him)]

Thanks for the report. This looks related to bug 1955693 - and may even be the same issue.

Comment 2

[Sarah Clements [:sclements]]

Emilio, do you think this will be fixed by bug 1856674 per your last comment in bug 1955693?

Comment 3

[Emilio Cobos Álvarez (:emilio)]

Likely, worth a try?

Comment 4

[Kelly Cochrane [:kcochrane]]

Looks like this was fixed by bug 1856674