Official Firefox Top 10 List ...

Yeppers. This is the Official Webware Top 10 List of lists. It was posted quite some time back by Rafe Needleman, but worth mentioning again.

The lists for About.com and Mozilla seemed to have vanished, but a pretty decent compilation of Top 10 Extension lists from Download.com, Irfan Habib, CyberNet, Simple Dollar and Moleskin . Depending on each list's slant, there should be one in there that will fit you just right.

Read/Write Web is Web 2.0 addons for Firefox, and probably the most impressive of the lot. They take a closer look at what web apps are using the browser as a platform.

The Lifehacker list was for top 10 tweaks.

And after you install all of those extensions, made all your tweaks, then you will need the Quick Online Tips list of extensions for managing ...ahem... extensions. I know I will.