1705335 - in full screen video, when you click on the video controls, it reach on the OS taskbar, which is "behind" it

Status: RESOLVED INCOMPLETE

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[epakompri]

Attachment: bugfullscreen.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0

Steps to reproduce:

I open a mp4 video in fullscreen, hover/click the video controls

Actual results:

If I hover, it show OS taskbar hover menu (date info in first capture)

If I click, it click on OS taskbar, making him come to front

It never happen before Firefox update to 89.0a1

My OS is Debian 10 with KDE

Expected results:

reach video controls on hover/click

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[John Lin [:jhlin][:jolin]]

This looks like UI issue. Moving to DOM component.

Comment 3

[Edgar Chen [:edgar]]

Thanks for reporting this issue.
If this starts to happen from the recently Nightly, it will be super helpful if you could run https://mozilla.github.io/mozregression/ to find the regression window.

Comment 4

[epakompri]

I have important exams in two weeks, I will run it after

Comment 5

[Bogdan Maris, Desktop QA]

I installed Debian 10 with KDE on a VM and used Nightly build from 2021-04-15 and latest Nightly from today but I could not reproduce the issue, when playing a random mp4 video in fullscreen I can hover over the controls (also clicking on them) and there is no interaction with the OS Panel whatsoever, I even played with the height of the panel a bit to see if that helps replicating but with no success.
Is there anything particular with the way you have the Panel set up, maybe some widgets? Any extra information would help.