My PC crashed just before, and it appears to have zapped my FireFox configuration, so bye bye bookmarks. Also all the cookies were fried, so now I have to relogin everywhere.

Edit: also, because I use Thunderbird, all my emails went bye bye. I got them back, fortunately, but it just shows that Mozilla's crash recovery SUCKS! Why are they even holding these files open while they're running? Open them when you need to write to them!