This addon is great. A bit hard to set up so that links open automatically, but once you get it working, it does the job. Especially useful for those who have outlook mail servers, which do not create unique links per email/thread. I also use it with org-mode, which makes it possible to keep links to important emails in my org file and achieve true inbox zero.
The project is open source (https://github.com/poohsen/thunderlink), so I really hope someone picks it up and makes it work with newer versions of TB.
This review is for a previous version of the add-on (1.2.1).