Rated 3 out of 5 stars

It was a lifesaver for me. Until... it stopped working! The function that I mostly used is to edit the Reference field. TB version 91.4.1 64bit.
The workaround that did the job for me (at least for once) was to move the email to a local folder, do the edit and then move back to the Gmail folder.

This review is for a previous version of the add-on (3.7). 

Please use the provided support email address for bug reports.