1952696 - mouse confined in 2560x1440 in full screen video on 4k display 3840x2160 since ff 136

Status: UNCONFIRMED

(Core :: Widget: Gtk, defect)

Description

[Raymond Ouellette]

Attachment: Firefox_136_Information.txt copied from Help - more info

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0

Steps to reproduce:

Arch Linux, gnome 47.5, Wayland (scaled 150%), 4k display, AMD Radeon RX 570 GPU
Since ff136 when viewing any video fullscreen the mouse cursor get confined in 2560x1440 borders and I can't reach bottom controls nor right side of screen. Any video of any site does the same.
But in Sway desktop (Wayland), same scaled 150 %, no problem at all. Problem is in Gnome desktop.

Actual results:

I'm using FF on Linux since 2000, first time I see such a problem and first time I filled a bug. Full screen video on a 4k display are unusable with the mouse cursor, but keyboard shortcuts work OK.

Expected results:

Like previous (before ff 136) version, mouse cursor should reach any part of the 4k display (3840x2160) not be confined in walled 2560x1440 because Wayland is scaled 150% for fonts in Gnome desktop 47.5.

Mozilla/5.0 (X11; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0

Comment 1

[Martin Stránský [:stransky] (ni? me)]

I can't reproduce that on Firefox 41 / Gnome 47.5 / 150% screen scale. Can you use mozregression to find broken commit?
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Use_Mozregression_tool
Thanks.