With Firefox 4, it's possible to hide the "extension bar" (previously status line); I like having it hidden to conserve screen estate, but I miss the keysnail icon. Could we have one in the Navigation bar? (This would be optional of course, you can always drag-and-drop these icons.)
(Main use case for keysnail icon: Someone is borrowing my computer/browser to check their email, and I say "oh, click the snail so that you don't have to suffer my strange keyboard shortcuts".)
Implemented toolbar button. Closes #40.