Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
Ditto. Rated 4 out of 5 stars
I like it - so-o-o-o tired of the few and ugly choices, all of them nearly invisible against the theme/colors I have in place. I too would welcome a version of this for Thunderbird 3 ( so I might actually be able to see its throbber too).