Which Linux distro are you using? Fedora Workstation
Which release version?
(if rolling release without a release version, skip this question) 42
(If rolling release, last date updated?)
Which kernel are you using? Linux 6.14.6-300.fc42.x86_64
Which BIOS version are you using? 03.08
Which Framework Laptop 13 model are you using? (AMD Ryzen™ AI 300 Series, AMD Ryzen™ 7040 Series, Intel® Core™ Ultra Series 1, 13th Gen Intel® Core™ , 12th Gen Intel® Core™, 11th Gen Intel® Core™) 12th Gen Intel® Core™
Hello. On my Fedora Workstation install, and in Fedora and Arch GNOME (KDE is not affect), the option widget.gtk.rounded-bottom-corners.enabled in about:config is bugged. Specifically, the window content rounds, but the window borner does not. In between the right-angled border and window contents is a barely visible transparent area (though significantly more visible when the GTK theme has a wider corner radius and the background has decent contrast with the web content and border color). More details can be found in the Bugzilla Report.
I am reporting this issue here because it occurs in multiple packaging formats, GTK themes (including the default) and distros (Fedora, Arch), but I cannot test it on different hardware (or bare metal), and I have seen no other reports of this. So I would expect some other Framework 13 users, or at least those with identical 12th-gen i5 SKUs, to be able to produce this bug.
I usually theme my Firefox with Firefox GNOME Theme, which I thought may have been the cause of the bug, but my VM testing, for which I did not install the theme, confirmed it was unrelated.