Hey, that's awesome! I stand corrected.
Re:Thunderbird’s New Home (2020)
by aspenmayer on Sunday February 27, 2022 @09:18AM
(#30488633)
More to the point, I hope it helps you! Since it’s been around so long, a lot of folks forgot or never knew that Thunderbird supports add-ons/extensions just like Firefox, or just expect the ones they want to not be available. I can only thank the devs of uBO.
https://github.com/gorhill/uBlock/releases/
Look for uBlock0_[version#].thunderbird.xpi
You can also verify this support from their Wikipedia page:
https://en.wikipedia.org/wiki/UBlock_Origin