As another Extend Firefox 3 contest winner, HandyTag deserves a look.  This add-on for Firefox provides a complete set of the most relevant keywords when you bookmark a page.  Where do these keywords come from?  Many different sources from around the Web.
This comes in handy when you bookmark a page, and your not sure exactly with what words it should be tagged with (or you don’t want to take the time to think it out).  There is no need [...]