GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
Currently Tor Browser 10 window on OSX 10.14 looks like that:
with huge bezels between the window border and actual web content, which randomly resize when the window gets resized. What is this and how can that be fixed?