It would not make any sense to have an add-on collection without having a collector to collect them with. Alongside the new collections feature on the Firefox Add-ons site – there is an extension to go with it. The Mozilla Firefox Add-on Collector will help you discover and organize your favorites into easy to manage collections.
How can you access them? Well, collections that you have marked as favorites in the Collection Dire4ctory will show up in a special section of the Add-ons Manager. That way, you can stay up to date with each collection. Also with it installed, each add-on you install can be easily shared with a friend or published to one of your own collections. So this makes testing and using add-ons for Firefox a much more social experience than it was before.
Go here to download the add-on and get started with your own collection.
If you have posted your own collection for the public to see using the Firefox Add-on Collector, post it in the comments. Would really love to see what you have all come up with.

The main idea behind Shareaholic, is to be the ultimate add-on for the link sharing addict. It works with Facebook, Twiter, MySpace, digg, Gmail, StumbleUpon and more; giving you instant access to reach for all your link submitting and sharing needs.
Need an add-on for Firefox that will allow you to keep up with the latest news or posts from your Twitter friends? 










Reframe It in Firefox
Want to be able to comment on any web site out there on the Web, without the permission of the web site in question? Reframe It opens up a new portal of communication, by allowing you to communicate through specific comments next to the web site you are referencing.
Why just send a simple text-based note, when you can send that and the web site you are talking about all in one swift, easy to access movement? Here is the extension in action:
It also supports sharing via Facebook, Twitter, RSS, HTML, and direct email so you can quickly share your comments.
Reframe It allows you to simple say what you want to where you want to. This extension would be perfect (as an example) if you were working on a web site re-design, and wanted to show your boss the areas you wanted to work on. Another example, would be citing research, when working on an article.
You can learn more about Reframe It via the Reframeit.com web site and pick up the Firefox add-on for the service on the Firefox Add-ons site.