Developer reply by Mime Čuvalo
Rated 5 out of 5 stars
Version 2.0.17 gave "Unable to make a connection. Please try again" messages immediately after trying to connect. Upgrading solved the problem.
This review is for a previous version of the add-on (2.0.28).This is fixed now in the latest version. Sorry for the inconvenience.
To create your own collections, you must have a Mozilla Add-ons account.