Rated 5 out of 5 stars

A spectacular add-on!

What is missing:

1) For editing headers, please parse and show all the headers instead of showing only some of them

2) Please allow to specify the font for the full message edit window

3) Looks like the add-on eats/hides leading spaces at least for headers. Maybe it's due to the font. This must not be happening. Spaces must absolutely be preserved.

4) My mail provider adds some huge headers - would be nice to be able to specify the field to cut automatically. I.e. I have this header field: "X-UI-Filterresults". Would be great to select any number of email messages, select this field and click "Delete this field".

5) Please add toolbar items: Edit Headers, Edit Full Message.

Great many thanks for the add-on!

This review is for a previous version of the add-on (3.9).