Tracking history would bound right into the 'creepy' range of data collection IMO. But if you were fine with that, it's not hard to imagine such a solution tra

Tracking history would bound right into the 'creepy' range of data collection IMO. But if you were fine with that, it's not hard to imagine such a solution tracking how much time you spent on a given page and using that to make an educated guess that you 'meant' to bookmark it. Or at least weight search results accordingly. Though the logistics of cloud-storing every single page every user visits would quickly become non-trivial. And your want #2 seems like a simple UI task. IE already has/had a "bookmark all open tabs"-style menu option -- and I thought the others did too, but I'm not seeing it at the moment.