I'm having problems with the game not responding to mouse input with the latest Firefox.
Steps to problem.
1. Start game as normal
2. Switch tab to another tab
3. Switch back
4. No longer able to do anything with the game
One workaround I have found so far is you can drag the tab to a new window and you will regain control.
EDIT The workaround is not quite right as I just opened my star menu and it's in the top left of the screen instead of the usual bottom center.
EDIT2 Also triggered by minimizing the window and restoring.
Title fixed
Latest fix can be found here