Google really doesn't know I hit the back button, do they? I just tried it and Chrome debugger shows the page load for search results coming from cache. I guess

Google really doesn't know I hit the back button, do they? I just tried it and Chrome debugger shows the page load for search results coming from cache. I guess I just don't see what information the browser sends that would allow them to know I had come back to the search results, from some specific page, via the back button.