One of the strengths of the Firefox web browser is its extensibility via a very robust plugin framework. Developers can add all sorts of cool bells and whistles to the browser to add functionality never thought of by the original developers. This is such a popular feature, that the net is flooded with extensions for users to pick up and try. However, it's hard to separate the wheat from the chaff, so users are either overwhelmed by the choices and run away, or spend hours trying to find the good ones through trial and error.
ComputerWorld recently did two articles on the topic of Firefox extensions, one on the 20 you simply have to have, and then 10 that you should likely avoid at all costs. If you're a tech-head who loves tweaking Firefox, gives these two articles a read over, you may find a few gems you didn't know about before.
20 Must-Have Firefox Extensions: link
Top 10 Firefox Extensions to avoid: link