3.6 barely runs on my machine as it is; a number of clients are asking me to downgrade them from 4 to 3.6 because of stupid issues like not saving your tabs by default when you close the browser. I have about thirty tabs open in my browser right now, and the last time I upgraded Firefox, it didn't bother to save any of them the next it launched.
I just can't be arsed to go to that much trouble over one website.
The landing page for FF4 has a "restore previous session" button on it which opens all your tabs for you if you so desire (just in case you missed that).
Also you can "pin as app tabs" anything that you like to consistently have open.
FF4 also runs considerably faster. I can't imagine wanting to downgrade ...
3.6 barely runs on my machine as it is; a number of clients are asking me to downgrade them from 4 to 3.6 because of stupid issues like not saving your tabs by default when you close the browser. I have about thirty tabs open in my browser right now, and the last time I upgraded Firefox, it didn't bother to save any of them the next it launched.
I just can't be arsed to go to that much trouble over one website.
edit: (removed snarky edit.)