Allows me to use Linux at the office! Rated 5 out of 5 stars

This is simply the best extension if you want to continue to use Linux at the office. Most businesses seem to have custom email stationery set up in Outlook and Thunderbird just isn't well equipped for it when run through Linux. SmartTemplate4 means that I can 'use' Calibri and other fonts when sending emails out so that I am inline with the company email style guide.

I have one little bugbear since upgrading to TB 13: It seems to append an extra newline to the beginning of emails above my template. I use the templates as the body of my emails as I need to be inside the template to use the custom styles that my company requires. Is there an obvious configuration option that I can tick somewhere?

EDIT: Marky - amazing! Thanks so much, that has just made my day!

This review is for a previous version of the add-on (0.9.1). 

bugfixes on bugzilla :)

The bugfix you are looking for is:
https://www.mozdev.org/bugs/show_bug.cgi?id=25084

please remember to check the bugs starting from here
http://smarttemplate4.mozdev.org/bugs.html

Axel, developer