Rated 5 out of 5 stars

overlay.css
#quickfox-notes-status-iconTab{
-moz-image-region: rect(-2px, 31px, 16px, 16px)!important;}
#quickfox-notes-status-iconWindow{
-moz-image-region: rect(-2px, 15px, 16px, 0px)!important;}
#quickfox-notes-status-iconSidebar{
-moz-image-region: rect(-2px, 47px, 16px, 32px)!important;}

This review is for a previous version of the add-on (2.4B.1-signed.1-signed).