Review for Thunderbird Message Filter Import/Export Enhanced by benign
Rated 5 out of 5 stars
If you are using newer versions of thunderbird, you need to hit the ALT key to bring up the classic menu, and then click TOOLS and IMPORT FILTERS. These options don't exist in the new menu.
This is kinda what the guy below me said in Spanish. Had to translate :P
To create your own collections, you must have a Mozilla Add-ons account.