To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseDeveloper reply by John Bieling
Rated 3 out of 5 stars
This add-on needs to "Have full, unrestricted access to Thunderbird, and your computer". I think this is a big ask considering what is expected of this app. Would have rated it 5 stars if it weren't for that.
This review is for a previous version of the add-on (5.10).There is ongoing effort to remove that full-access-permission:
https://github.com/jobisoft/quicktext/issues/371
To create your own collections, you must have a Mozilla Add-ons account.