(Gérard Durand's version for TB) not an option Rated 5 out of 5 stars
...because the missing scrollbars problem that is solved in Noia 4 for FF is not solved in Gérard Durand's version for TB.
Also the addons manager in that version is (cosmetically) buggy.
So a Noia 4 for Thunderbird would be an option.
I know people would like a Noia 4 for Thunderbird, but I really don't have time to manange another addon, sorry.