To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Add Signature by WillyP
Rated 5 out of 5 stars
Works great, you can right click and choose to add your siggy at the cursor or at the end of the e-mail.
Took me a little head scratching to figure out how to set up a signature, here are the instructions: Signatures | How to | Thunderbird - http://support.mozillamessaging.com/en-US/kb/signatures
To create your own collections, you must have a Mozilla Add-ons account.