Thanks for the alternative to Toolbar Buttons Rated 5 out of 5 stars
This functionality has been missing from Thunderbird for a long time. Thanks, Michael, for finally making it possible to add custom toolbars. Now you'll have plenty of room for all the buttons you want! When one toolbar is full, simply add a new one below it.
New toolbars can be created in the Main window and in the Read window of Thunderbird, but not in the Compose window. You can add whatever buttons you want to the custom toolbars that you make. In your next release, maybe you can find a way to add toolbars to the Compose window too.
This add-on is highly recommended for all Thunderbird users. Users of Firefox, Flock, and Netscape 9 can use Michael's "Toolbar Buttons" extension (version 0.4 and higher) to create their own custom toolbars in those applications. Toolbar Buttons also works on Thunderbird and Sunbird. However, if you do not need all those extra icons, then TB Custom Toolbar buttons for Thunderbird is the way to go.
You can find additional information here.
I have taken more screenshots for you and added some notes to enhance the description. You can use any of my screenshots for this AMO listing, your web site, and anywhere else you wish to distribute this add-on.
Keep up the good work, and I'm anxiously looking forward to the next release.