Find the file url-data.txt in your profile directory, zip it up (it won't work otherwise) and submit it using the form below. It's anonymous.
If you don't have a clue what we're going on about, take a look at http://www.mozilla.org/projects/ml/autocomplete/index.html.
If you don't like forms (or this form doesn't like you), mail your zip file as an attachment to nisheeth@netscape.com and ang@cs.stanford.edu.
This form is graciously hosted by MozillaZine.