Rated 2 out of 5 stars

1. signature is added every time and address is entered / modified in any of the address fields. I frequently see the mail composition form having a huge number of copies of the signature at the bottom of the message.
2. This add-on seems to over-ride my font settings for messages.
3. There is no way to control the position of the signature - it defaults to the bottom of the e-mail chain.

This review is for a previous version of the add-on (1.6.15).