2057170 - Context menu items' hover backgrounds break out of the container

Status: RESOLVED DUPLICATE of bug 2057169

(Firefox :: Theme, defect, P1)

Description

[:Vincent]

Attachment: Screenshot From 2026-07-23 10-52-54.png

Steps to reproduce, with Nova enabled:

1. Right click on a page.
2. Open a submenu
3. Hover over the first or last entry

What should happen:
The background colour has rounded corners that fit the rounded corners of the submenu. (See attached screenshot.)

What actually happens:
The background colour has square corners that get cut off by the rounded corners of the submenu.

This is on Nightly 155.0a1 (2026-07-22) (64-bit) on Linux.

Comment 1

[Jules Simplicio [:jules]]

This menupopup uses the panel border radius token which with Nova on is now a roundier value. Some of our latest token changes have affected it consequently.

The line is here. We should instead not share styles and make a custom property or token for menupopup border radius and go back to the smaller radius to guarantee it never changes based on what we do with our other panels.

Comment 2

[Ania]

Hi folks,
Noting that while this is very minor, this is a frequently used surface (over 5M DAU), so it'd be great if we can address it in time for 156.

Comment 3

[Stephen Thompson [:sthompson]]

Bug 2058257 may be describing the same underlying cause affecting other menus in linux (page content <select>, file/edit/view menus) that have broader reach, especially the <select>