Site Inspector is a true "cross browser" application because it supports both the Internet Explorer and the Firefox/Mozilla browsers in three ways:
· Site Inspector's stand alone browser application "Analyzing Browser" combines both browser engines into one application
· Site Inspector's comprehensive toolbars are available in all three browsers: IE, Firefox and Analyzing Browser
· Site Inspector adds various functions to the context menus of IE and Firefox
You can switch between IE and Firefox with one mouseclick in the Analyzing Browser (the screenshot shows the corresponding two menu items).

Also you can switch between the main windows of IE and Firefox with a menu item of their toolbars.
Site Inspector is a powerful HTTP-client/server test application designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors.