1921284 - Popups (such as bookmarks) don't use the available height when system fractional scaling is enabled on Linux (Wayland)

Status: RESOLVED WORKSFORME

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

Description

[anodroid]

Attachment: Left is OK (Snap), right is NOT OK (deb package or Flatpak)

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Steps to reproduce:

• use Firefox (deb package or Flatpak) on Ubuntu or Kubuntu
• in the systems settings (Gnome or KDE), enable fractional scaling (125%)
• open a popup such as bookmarks

Actual results:

The popup doesn't use the available height (deb package or Flatpak). I have to scroll to see all the bookmarks.

Expected results:

The popup should use the available height.
It works as expected with the Firefox Snap.

Comment 1

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

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

Comment 2

[anodroid]

Forgot to say that it happens only on Wayland.

Comment 3

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

Please test latest nightly:
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Testing_Mozilla_Nightly_binaries
with widget.wayland.fractional-scale.enabled set to true at about:config.
Thanks.