Have to say that the vanilla Opera browser is supreme for this. Just hit back and you're good to go. Might not cover a browser crash, but the most common eventualities, sure.
Agreed...
I used to have this problem years ago with BM and other games, back when I used either IE or Firefox.
Now I use normal Opera and have never had this issue since - because you do indeed just click "Back" and then it's all there where you left it. Unless the entire browser crashes, I imagine, but that hasn't happened to me for years. I just stick with Opera and don't need any add-ons
And it can cope with multiple "back"s if required.