1698375 - Opening submenu in appmenu ends up hovering over page momentarily

Status: NEW

(Core :: Layout, defect, P3)

Description

[Asif Youssuff]

Attachment: Screen Recording 2021-03-14 at 12.25.10 PM.mov

Steps to reproduce:

1. Set browser.proton.enabled to true
2. Restart Firefox
3. Open appmenu
4. Click "History"

What happens:

The page is hovered over while the menu updates to the History submenu

Expected result:

The page should not be sensitive to input while the appmenu is open.

Comment 1

[Asif Youssuff]

Attachment: test.html

Comment 2

[Alice0775 White]

I can reproduce the issue without setting browser.proton.enabled = true in Nightly88.0a1 and Firefox78 windows10.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=e45bf764fb121c92f4cc2665935e1f9cc78ac6b5&tochange=96c90df47bdab0cebeed56e31dbaf2d9ed5b97f6

Comment 3

[Timothy Nikkel (:tnikkel)]

Probably fixed by the patch in bug 1681692 (I need to write a test for it so it can land).

Comment 4

[Bill Goldstein [:aja] (UTC-6)]

(In reply to Timothy Nikkel (:tnikkel) from comment #3)

Probably fixed by the patch in bug 1681692 (I need to write a test for it so it can land).

FWIW, it's noticeable on pages like hg pushlog that have hover state for table rows.

Comment 5

[Timothy Nikkel (:tnikkel)]

Does this bug still happen?