Comment by david_draco

A browser using 32 GB for 8 tab isn't necessarily wasteful, there is a lot of caching one can do to make back/forward buttons extremely fast. It would be wasteful to not allocate that memory if it is otherwise free and unused. Usually browsers use up what is available. The more interesting metric would be whether starting another high-RAM application will lead the browser to give up most of the 32 GB.