Rated 5 out of 5 stars

So far I love this addon. It does exactly what I need.

For anyone wanting to add hyperlinks to their signature do the following...

1. Open any HTML editor
2. Create your signature
3. For things like your email address, linkedin address, twitter, etc... highlight each and find the "insert link" option on your HTML editor. Insert the appropriate link for each address.
4. Now find the option on your editor to view the HTML source code for the signature.
5. Copy/paste that as your signature for Thunderbird.

This review is for a previous version of the add-on (0.4.2).