I can confirm most of these issues, after testing in a Kubuntu 22.04 VM, with a Wayland session:
The issue with the font size (2) might be caused by the use of the incorrect theme (3). The firefox deb reports in about:support that the system theme is "Breeze / Adwaita-dark", whereas the snap reports "Adwaita / Adwaita". The problem with the mouse cursor theme is that the gtk-common-themes snap doesn't include Kubuntu's default cursor theme. Dialogs to open files are really ugly indeed. ** Summary changed: - Various UI and theming issues in Firefox snap when running in Plasma Wayland session + [snap] Various UI and theming issues when running in Plasma Wayland session ** Tags added: snap ** Changed in: firefox (Ubuntu) Status: New => Confirmed ** Changed in: firefox (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1959027 Title: [snap] Various UI and theming issues when running in Plasma Wayland session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1959027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs