I always search in my history browser to find the last questions that I have visited recently, so I spend a lot of time trying to search in my history browser which contains a lot of links. Some times I can't find the link if I cleared the history cache or if I'm connected from an other PC.
It's really easy to realize this feature, this will be done, just by storing the ID of the current subject, and list all those links on a page on the activity tab, or just a client side solution that list all the recent visited subjects on the current session.