Rated 5 out of 5 stars

Copy Pure Text works fine with FF 6 (5 Stars), but not with TB 6 (this is the reason for 4 Stars)................ I hope in future Copy Pure Text will be developed for Thunderbird 6 and higher

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

Thunderbird Compatible

Version 2.0.0 is compatible with thunderbird. Give it a try. For any feedback, feel free to email me.