Along with the new Firefox Add-ons web site, the people at Mozilla also treated us to a new feature called collections.  What are they?  Well, they are a group of related add-ons that are assembled for easy sharing. 
Here are some of my favorites I have found thus far:

Web Developer’s Toolbox 12 add-ons to help you speed up the development process when it comes to web development and managing the ins and outs [...]

Filed under the “whoops! sorry about that!” department of PR over at Yahoo (then again, they haven’t changed it yet either).  It appears when you go to Yahoo.com via Internet Explorer 7, you are given a message to upgrade to Firefox 3.  How nice of them…

Thanks Yahoo, I am sure Mozilla and the Firefox team appreciates the support!