This doesn't appear to be specific to a certain family of graphics drivers. I can observe the issue here with Intel GFX, on X11. Wayland doesn't exhibit the problem.
** Bug watch added: Mozilla Bugzilla #1558065 https://bugzilla.mozilla.org/show_bug.cgi?id=1558065 ** Also affects: firefox via https://bugzilla.mozilla.org/show_bug.cgi?id=1558065 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1828728 Title: White corners when CSD is enabled on Firefox To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1828728/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
