Rated 4 out of 5 stars

le etoilebleu ar Noll. 13, 2018 · buan-nasc

Does exactly what I was looking for: auto-switch my signature based on To: email addresses.
I wanted a different signature for internal vs. external emails. Thank you for the great add-on!

FYI:
[1] If you haven't seen the FAQ site, you need to
http://mozext.achimonline.de/signatureswitch_faq.php

[2] You need a default signature in your TB account settings>signature text. Otherwise you get some odd issues like multiple signatures in a reply, or deleted email text when you make changes to the recipient addresses.