Collections by Fernando Pereira Silveira
Thunderbird GNOME 3 Integration by Fernando Pereira Silveira
Add-ons to integrate Thunderbird to GNOME 3 (well, at least GNOME 3.14)
Create a New Collection
Collections make it easy to keep track of favorite add-ons and share your perfectly customized browser with others.
Create a CollectionTo create your own collections, you must have a Mozilla Add-ons account.