Rated 4 out of 5 stars

The perfect them for Thunderbird, except it has a problem with the RSS reader (feed's body is not displayed).

This review is for a previous version of the add-on (1.0.2.3).  This user has other reviews of this add-on.

Did you try https://addons.mozilla.org/thunderbird/addon/ignore-aero/versions/1.0.2.4 (not yet reviewed)?