Fantastic and works in 3.5 Rated 5 out of 5 stars

Following 3.5 was unable to Drag a Tab as Rich Text HTML into Thunderbird.
Then I found CoLT and as default I could get the Html code which is great for Blog Comments
Then I found Options Add and an option for Rich text Html which I called HTML for Email and a right click and I have a better option than the old tab drag.
Thank You and I would suggest add HTML for Email into your defult

This review is for a previous version of the add-on (2.4.4).