1793361 - window.screen reports invalid screensize on scaled screens on OS-X

Status: RESOLVED DUPLICATE of bug 1525379

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

Description

[Tom Schindl]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

I have a 3 screen setup:

• MacBook Pro Retina Display - 1512x982 (default scale)
• Large 2nd screen (main screen) - 3008x1692 (scaled)
• Smaller 3rd screen - 1080x1920 (default scale - rotated by 90°)

and place the browser window on the right side of the main-screen.

Actual results:

If I position Firefox on the main screen on the right handside window.screen reports invalid sizes: 540x960 (see attached screenshot ff-wrong). If I move the window to the left of the screen the size is reported correctly 3008x1692 (see attached screenshot ff-correct).

As one can see the invalid size is half of the 3rd screen I think the browser thinks the window is on the 3rd screen.

Expected results:

The browser needs to report the correct size

Comment 1

[Tom Schindl]

Attachment: ff-wrong.jpg

Comment 2

[Tom Schindl]

Attachment: ff-correct.jpg

Comment 3

[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 4

[Josh Aas]

This was fixed in bug 1525379. I can reproduce this in a build without that fix, I can't reproduce it in a build with the fix.