Rated 4 out of 5 stars

Love this - I always read email in plain text if possible - but this advertised behavior doesn't work: "When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings" Original HTML is sticky, until I manually confirm Plain Text (which is already checked). (7.0 on TB 91.2.0 on Windows 8.1)

This review is for a previous version of the add-on (7.0).