These are called "Factories". They are added automatically and allow the adapter to load the appropriate dlls to be able to interact with the detected technologies. In your example; ActiveX, MSHTML, and WinInet. If you load a site with Java, you may also see a Java factory. You really don't ever need to alter them except under the direction of support. UseKeys is enabled to allow them to attach to different instances of each technology as they are loaded into the browser.