Rated 2 out of 5 stars

chrome://thunderstats/content/mzts-statstab.xhtml : Unable to run script because scripts are blocked internally. (unknown)
XML Parsing Error: not well-formed
Location:
Line Number 1, Column 691: (unknown):1:691
chrome://thunderstats/content/mzts-statstab.xhtml : Unable to run script because scripts are blocked internally. (unknown)
XML Parsing Error: not well-formed
Location:
Line Number 1, Column 237: (unknown):1:237
SyntaxError: An invalid or illegal string was specified jquery-3.3.1.min.js:2

This review is for a previous version of the add-on (1.4.1). 

ThunderStats has been rewritten from scratch, try version 1.9.x for Thunderbird 115 or version 2.x.x for Thunderbird 128+!

Thank you!