Review for Gmail IMAP Account Setup by Gadget Master
Rated 3 out of 5 stars
Hello everybody, you can checkout "Flat Folder Tree" (https://addons.mozilla.org/en-US/thunderbird/addon/195535/) which lets you flatten out [Gmail] subfolders while still maintaining your Gmail labels. Rest of the features offered by this add-on have already been implemented in Thunderbird 3.1.
To create your own collections, you must have a Mozilla Add-ons account.