Kudos. But they should really invest time in making the UI responsive and fast. This is my biggest gripe about firefox. I also find it incomprehensible that it checks for updates on startup in a modal fashion. Very annoying.
Non-Windows still has modal update dialog. On startup for non-Windows you are blocked from using the browser until the update is complete. There is a dialog if you run out of date extensions. There is a nag dialog if you have an update pending for over 24h.
