I wish browsers did this automatically so that the back button works properly instead of being just a guess on whether you pressed it or not.
It seemed to me that older versions of the Opera browser did this, and the text-based "links" browser seems to do this today.
I've even had an issue on a project recently caused exactly by the rendered view being saved for the back button. I've also had to demonstrate a possible issue with full page loaders on a regular website twice for the same back button reason - because apparently people (or at least several of my colleagues) don't find browsers' native request loading indication enough anymore... Rotten by JS loaders and SPA's, I guess?