I believe you are confusing logical names and physical descriptions.
BROWSER MAIN WINDOW_1 looks like a logical name. The Regular Expression facility is intended to be used within a physical description, so before being able to help you we have to see the physical description of the window(s).
Somebody suggested usage of "!browser main window.*:.*"
<font size="2" face="Verdana, Arial, Helvetica">doesn't make much sense, based on what you've told us.
Quality is the result of a carefully constructed cultural environment. It has to be the fabric of the organization, not part of the fabric.