Great little tool with just one problem - the 'put all tabs on the pile and close them' feature. Twice now I've clicked it by accident, when my browser was lagging with too many tabs open; getting them back is a real pain, and the first time it happened I couldn't even figure out where they'd gone, I assumed it was a firefox glitch. And now I have a few hundred (look, we've all been there) extra bookmarks on my Pile that don't belong there that I'm going to have to spend days or weeks getting cleared out. Maybe make this feature optional? Or put in an 'undo' button?