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.
CloseReview for Sieve by oldstupidcat
Rated 3 out of 5 stars
So, as far as I can tell, this DOESN'T work on Thunderbird 9x.x.x. It won't come up. Probably a XUL/early XML issue.
I've been trying to stay on 78.x for this reason but an auto update this morning made it break on my system. Was hoping an update was forthcoming.
To create your own collections, you must have a Mozilla Add-ons account.