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 Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1828728 Title: White corners when CSD is enabled on Firefox Status in Mozilla Firefox: Unknown Status in firefox package in Ubuntu: Confirmed Bug description: With CSD enabled, Firefox 66.0.4 displays white corners at the top- left and top-right of the window. Ubuntu version: 19.04 (fully updated) Version: Firefox 66.0.4 (64-bits) Desktop Environment: GNOME 3.32.1 (default) GTK theme: Yaru (default) GPU: Radeon RX 560 Series (POLARIS11, DRM 3.27.0, 5.0.0-13-generic, LLVM 8.0.0) Expected behavior: rounded corners without the white corners, following the current theme. To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1828728/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
