http://googlebar.mozdev.org/feedback.html#c243
Dan Nick
Either in the default.css or userChrome.css
#separator1, #separator2, #separator3 {
display: none !important;
}
Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.1) Gecko/20040707 Mnenhy/0.6.0.9