Review for MinimizeToTray by R
Rated 5 out of 5 stars
Made a hack that will allow installation to Firefox and Thunderbird up-to version 9.9.9. Works in Firefox 3.0.4 perfectly.
http://fileshed.bravehost.com/uploads/minimizetotrayhack%20firefox%209.9.xpi
To create your own collections, you must have a Mozilla Add-ons account.