You know, I think I have something like that on me FireFox... but I keep it deliberately turned off. And, in any case, while I got many bookmarks in many folders (just counted them all - got 238 links in 19 folders), most of the site addresses I still type in myself.
PS. Oh, I DO have something like that there on me FireFox. Nine items total, and right now I got there my mail site, Gamespot, Piratebay (says a lot), CL, site of my MMO guild (no way I am giving you bastards the link), Steam, forum DnD site, another forum DnD site (again, you aren't getting the names) and Youtube.