Many of them you could probably say at some level that I "need them", in that it'd be faster to find the tab among the open ones then to find the content again.

Many of them you could probably say at some level that I "need them", in that it'd be faster to find the tab among the open ones then to find the content again. Usually they end up clustered into groups around particular topics. For example "all of the man pages for the BSD socket API" and "all of the RFCs for the protocol I'm implementing".