Often it will be documentation + stack overflow results. It can be handy to just leave that stuff open, because then you can find it easily. I do purge all tabs

Often it will be documentation + stack overflow results. It can be handy to just leave that stuff open, because then you can find it easily. I do purge all tabs every now and again, but when there's no downside to leaving them open, they can build up for a month or so.