Developer reply by Beonex
Rated 1 out of 5 stars
This add-on does not show half of my mail folders and its display speed is very slow. It is as if it is frozen. This add-on seems to be bad at handling large mail folders and deep hierarchies.
This review is for a previous version of the add-on (1.4.0.1).Is this immediately after setup? Did you wait until the initial sync is finished? This may take a few hours.
To create your own collections, you must have a Mozilla Add-ons account.