*Firefox (install Greasemonkey or Scriptish first)
*Google Chrome (no plug-in required, just click "Install")
*Opera (no plug-in required, save the script to the User JavaScript folder)
*Safari (install GreaseKit first)
*Internet Explorer (install IE7Pro, download the script, change the extension to .ieuser.js, copy the file to c:\program files\iepro\userscript and enable the script in IE7Pro's settings dialog)