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.