Review for Quickfile by rawat
Rated 1 out of 5 stars
everywhere (at least 3 places) you are claiming "Quickfile is an extension for Mozilla Thunderbird which initially aimed to speed up filing of messages into your mail folder heirarchy but now includes features for navigation and folder creation. "
but you have not really mentioned anywhere what are those features.
To create your own collections, you must have a Mozilla Add-ons account.