I know of certain sites, once you launch the browser after a shutdown, everything disappears.
A refresh of page makes everything dissappear on all browser, the backward navigation won't work on a refresh that I'm sure. In the case of sudden
shutdown, most browser has a session recovery storage to recover all opened tabs on that specific browser when it restarts.
Your proposal is a nice one actually, I've came across a post actually on this board talking about this very stuff , I will try quoting it if I find any....