1929815 - onHover flickers if a second firefox window is full screen (entire screen) on macOS.

Status: UNCONFIRMED

(Core :: Widget: Cocoa, defect, P3)

Description

[Nevzat Cubukcu]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0

Steps to reproduce:

On macOS, open 2 windows.
Full screen one of them and open any website.
On the regular size, go to a webpage that has onHover action. For example Google Drive does it. On each file line, there are icons on the rigth such as share, download, rename icons. Those icons flicker as you hover over them.

Make the other full screen window regular size and the flickering onHover goes away.

Actual results:

Icons that should become visible onHover started flickering.
Dropdowns that should open and stay open onHover did not.

Expected results:

Icons that should become visible onHover started flickering.
Dropdowns that should open and stay open onHover did not.

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Cocoa' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Stephen A Pohl [:spohl]]

Could you run mozregression to see if this is a regression? You can either choose to use the GUI tool, or simply run these three commands in a Terminal window:

sudo easy_install pip
sudo python3 -m pip install -U mozregression --ignore-installed
mozregression --good 2017-01-01

A number of Firefox versions will open in succession to narrow down when this started occurring. Simply type "good" or "bad" in Terminal based on whether or not a build reproduces the bug. Once finished, please post the output from the last run. It should give a last good and first bad revision as well as a link to look at the changesets in that range. Thank you!

Comment 3

[Nevzat Cubukcu]

Attachment: Nov-12-2024 14-52-08.gif

Comment 4

[Nevzat Cubukcu]

I could not reproduce it on the versions mozregression installed.
It quit after the second try because it was expecting it to work.

I have attached a video (Nov-12-2024 14-52-08.gif) of what I mean is the problem.

Comment 5

[Stephen A Pohl [:spohl]]

Are you able to reproduce this in troubleshoot mode (Help > Troubleshoot Mode...)? If not, this may be due to an addon that you have installed. Could you temporarily disable them one by one to identify the addon that may be causing the issue?