The restore session feature of Firefox is really nice, It allows you to prune down what tabs you want to restore after a crash. Assuming you know which window has that nasty flash file fucking everything up.
The problem I have with it is that there are two actions which can be taken from this screen: start a fresh browser session or to restore existing tabs. A similar issue has been a major annoyance for many people in GMail where the Send and Discard buttons are right next to each other and have similar prominence.

There’s a few problems with this screen. First of all the wording “Start New Session” is ambiguous. In conjunction with restore one can infer that a new session is a blank session but on its own “Start New Session” could mean starting a session with the selected tabs. I’d prefer something along the lines of “Blank Session”.
The other problem is that both of these buttons are given equal prominence. Or more specifically there’s very little differentiation between them visually, they seem arbitrarily placed. I wouldn’t really mind if it weren’t for the fact that if you accidentally click start new session there is no way to get those tabs back.
There’s also an issue with the placement of each of the buttons in relation to the dialog:
The check marks for pruning the tabs you wish to open form a line pointing at the Start New Session button. If you’ve done any pruning you’re going to want to restore and yet the flow leads you to create a new session. Every time I’ve mistakenly clicked Start New Session it was after pruning.
Hopefully Aza Raskin and the rest of the Mozilla team can just swap the button location and maybe add some other restore features so starting a new session isn’t quite so permanent.

