The browser seems to be coming along nicely, can't wait to test it out during the public Beta in February!
Have you tested how the browser looks on distros other than Ubuntu yet? Since all the official screenshots seem to be on Ubuntu. I'd be particularly interested to see how it looks on distros using other desktop environments (eg. KDE, Cinnamon, XFCE, COSMIC). Although given that it uses Libadwaita, there shouldn't be any visual errors (even if it doesn't look like a native app in every DE).
