Rated 5 out of 5 stars

Manuel erabiltzaileak bidalia (ira. 30, 2010) ·

Quickfile was excellent, unfortunately it's not maintained any more. But there is an alternative. Check the nostalgy add-on. It has equivalent functionality but more features.
https://addons.mozilla.org/af/thunderbird/addon/2487/

This user has a previous review of this add-on.