During my daily Firefox sessions (w/over 300 RSS feeds), I commonly visit about 50 web sites. At the end of a session I may only want to keep one or a few history entries and have to manually delete the rest. I always keep one in particular. It would be infinitely easier if the capability of "Keep this Site" option were available in the right-click menu which would mean deleting the remainder of the history entries not marked to be kept, in conjunction with the History delete options in Firefox Preferences. Note: This is a real User need I have, and possibly many others would like the versatility.