I think this is a good thing. I tried Beta 6 just a few hours a go and it is full of issues that stopped me getting back to a workable state (using Firefox Sync

I think this is a good thing. I tried Beta 6 just a few hours a go and it is full of issues that stopped me getting back to a workable state (using Firefox Sync). Reverted to 3 and all is good again. They still have some kinks to iron out I guess.