To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Rated 5 out of 5 stars
Just what the doctor ordered! Works well in preview window (main thunderbird).
It would be nice if it worked in the opened mail as well (okay, I hardly open my mails anymore, but nice to have all the same)