Rated 4 out of 5 stars

It is a great extension.
However, it saddens me that it isn't integrated as a core feature. For many folks that daily speak RTL languages (I speak Hebrew for example), this is a deal breaker.
Therefor, I push back on using Thunderbird altogether, until this extension is compatible with v.115

This review is for a previous version of the add-on (0.13).