1798831 - White border appearing in Firefox Nightly

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[theraptor01]

Attachment: nightly_bug_white_border.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Steps to reproduce:

Putting Firefox Nightly in full screen mode (F11) while watching Twitch

Actual results:

after a while, a white border appears around the browser

Expected results:

The white border shouldn't appear.

Comment 1

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

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

Comment 2

[Brad Werth [:bradwerth]]

Thank you for filing. I can't reproduce this on macOS. Would you please run a mozregression on your system to determine when this problem started happening?

Comment 3

[theraptor01]

(In reply to Brad Werth [:bradwerth] from comment #2)

Thank you for filing. I can't reproduce this on macOS. Would you please run a mozregression on your system to determine when this problem started happening?

i use Windows 10 64bit. It usually happen after a while. i'm sure there are more people with the same problem.

Comment 4

[Brad Werth [:bradwerth]]

(In reply to theraptor01 from comment #3)

i use Windows 10 64bit. It usually happen after a while. i'm sure there are more people with the same problem.

Sure, but none of the developers have been able to reproduce it yet. Would you please run mozregression and help us identify the code that causes this problem?

Comment 5

[theraptor01]

i wasn't able to get mozregression working...

I got that problem right now, and it seem to happen, most of the time, when i minimize the browser, and letting Windows put the monitors into sleep mode. Often it seem to create this white border around Firefox Nightly.

Comment 6

[theraptor01]

Ok, it seem like the steps to reproduce the bug is:

1- open Nightly.
2- Put it in full screen mode (F11).
3- minimize it.
4- maximize it.

Comment 7

[Brad Werth [:bradwerth]]

Thanks for the refined Steps to Reproduce. We'll keep look for somebody that can reproduce this. If you can get mozregression working, then it will dramatically increase the chance we can fix this Bug.

Comment 8

[Brad Werth [:bradwerth]]

Still trying to find a person who can reproduce, and it still would be helpful if you would try to run mozregression to identify the code that caused this. In the meantime, would you please provide us with:

1. a copy of the "Graphics" section of your "about:support" posted as an attachment to this Bug
2. a video of the of the problem occurring on your system, including the steps you use to reproduce the Bug

Comment 9

[Ashley Hale [:ahale]]

From my experience with Windows API, the steps to repro are interesting - fullscreen is a borderless window, minimize is a minimized borderless window, maximize I'm not clear what flags are set - it's possible that Firefox thinks the window is still in a borderless window state and refuses to draw its custom decorations because it doesn't realize that maximize is different than fullscreen.

Comment 10

[theraptor01]

Attachment: graphics1.png

Here are screenshots of the tons of stuff showing for the Graphics section. The Decision Log section at the end doesn't seem to have anything out of the ordinary.

Comment 11

[theraptor01]

Attachment: graphics2.png

Comment 12

[theraptor01]

Attachment: graphics3.png

Comment 13

[theraptor01]

The problem seem to be fixed in the latest builds.

I know it's something that could break, when updating other things in the code.

Comment 14

[theraptor01]

no, it's not fixed, unfortunately...

Comment 15

[theraptor01]

i think i may have found HOW to exactly trigger this bug.

1- Put Firefox Nightly on your 2nd monitor connected to your computer (on mine, my 2nd monitor is on the right)
2- Press F11 or press the Full Screen option
3-on Nightly on the 2nd monitor, put your mouse cursor up to make the menu appear and press the Minimize option on the upper right corner.
4- On your first monitor (center for me), press the Nightly icon on your task bar.
5- You should see this white border on the navigator.

How the bug is NOT triggered, while Nightly is full screen on the 2nd monitor:
1- press the Nightly icon on your first monitor on the task bar, to minimize it.
2- press the Nightly icon on your first monitor again, on the task bar, to maximize it.
3- Nightly shouldn't display a white border after being maximized on the 2nd monitor.

So this problem may affect only users having multiple monitors.

Comment 16

[theraptor01]

The bug seem to be gone now. I don't know if my previous reply helped more, or if something got fixed randomly, but it's a good this it seem to be fixed now.