>The interesting thing that it worked fine before (last time I tried, I guess, don't recall when it was).

There is a lot of processes that are running in the background to get the content you have. For example, depending on your profile, a refresh will be done to refresh the toolbar, if you have the dashboard, that will trigger another one right after. So, those hits go in the loop. If this is about the global back button, then it would be a factor. Unless you force it at the frame level, if the browser supports it.