As browser history - from the beginning of Time - appears as an underexploited gem, I think it could be bettered by storing the referer (previous visited page) along with each history entry. That way, the history could be rendered "tree-like" instead of a plain list. Web statistic packages already compute that to know the browsing patterns of visitors - I think users might find that useful too. Maybe browsing in a tree-fashioned way should be accomplished by an extension, but I think that the problem core (storing the referer) belongs to the browser.

I'm pretty sure it already does (on the trunk), thus the How'd I Get Here extension at http://www.squarefree.com/extensions/high/

Already fixed on the trunk. *** This bug has been marked as a duplicate of 128398 ***