This is specific to the unification of the menu-bar into the title-bar through client-side decorations. I am about to attach two more screenshots that show the difference when the unification is disabled vs the default.
** Attachment added: "with menubar in title bar" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1871644/+attachment/5349701/+files/firefox-csdbug-unified-menubar.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871644 Title: Top corners of Firefox windows have weird black protrusions from the rounded edges To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1871644/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
