Rated 5 out of 5 stars

QNote is a great add-on. It is working seamlessly with Thunderbird and the GMail IMAP server. I find it indispensable for, e.g., dealing with quotes and shipment email from Dell. All the email subjects are similar and don't give me enough information. With QNote, I can add the estimated ship date and other information where I can see it without having to open the email. I can also sort by the QNote column (in local mail folders) to get an overview quickly. Because this is such a handy piece of software, I donated!

This review is for a previous version of the add-on (0.10.1). 

Thanks for review and donation! Much appreciated :)