Rated 3 out of 5 stars

Overall works as advertised, I guess, but I'd like it a whole lot better if it would put the signature in the same place I specify for auto-quoting placement in Thunderbird's Account Settings / Composition & Addressing -- in particular, above the quote as others have mentioned.

Another improvement would be for it to support different settings for different email accounts. One size doesn't fit all...

This review is for a previous version of the add-on (1.6.4).