Rated 5 out of 5 stars

Muy buen complemento. Agradecería no eliminara la firma configurada al utilizar solamente el encabezado.

This review is for a previous version of the add-on (1.0). 

Thanks for stopping by and for the nice review.

If I understood you correctly, you do want to use the signature you have configured using the Thunderbird signature setting, but somehow your signature is removed while this add-on is active. Since I don't use the Thunderbird signature setting to set up my signature, I have yet to find out why it behaves this way and hopefully there will be a solution to this.