https://bugs.documentfoundation.org/show_bug.cgi?id=157163
--- Comment #7 from Jeff Fortin Tam <[email protected]> --- >From your screenshot I see that you are running Ubuntu 20.04's patched up desktop environment, which is, strictly speaking, not really GNOME; as they have their own unofficial customizations, theming (which apparently does not use any background color for GTK notebook tab widgets), it does not represent GNOME's official UX and styling. And yeah, 3.36 is 3½ years old at this point, that's seven GNOME release cycles behind ;) The "border" you see is the delimitations of where the tabs' background color would normally be rendered, so you are seeing the same thing as me, just that your theme doesn't render it properly... Workaround to reproduce: install the "GNOME Tweaks" tool and switch your GTK theme to "Adwaita", GNOME's official look. -- You are receiving this mail because: You are the assignee for the bug.
