Review for Profile Buttons by Noitidart
Rated 5 out of 5 stars
I haven't tested this, but thanks for making this. I created the addon Profilist - and have linked to this addon from there because users have asked me about a button in the browser to access profiles, I don't have plans for that, so this is a great alternative (if it works).
To create your own collections, you must have a Mozilla Add-ons account.