Review for RefControl by CapnSlow
Rated 3 out of 5 stars
Works well but I lost it from the add-on bar and couldn't get it back until I edited "prefs.js" in the Firefox profile directory. Before I figured out how to re-materialize the RefControl icon, I send an email to the developer which immediately bounced (not good) and there's no other way to contact him.
Could be a great add-on if developer support was taken seriously.
To create your own collections, you must have a Mozilla Add-ons account.