Firefox Add-On Must-Haves

I've got two links to two different articles concerning Firefox add-ons.  The first is geared toward web developers and has such gems as Firebug and ColorZilla (a friggin' lifesaver when Photoshop is not playing nice).  The other has an amalgam of different add-ons, some dev based, some email based.  Enjoy!

CNet Web Dev Add-Ons
EveryJoe.com Preferred Add-Ons

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