If you regularly develop extensions to IE (like I do), at some point you’ll need (or want) to extend the user-agent header string that IE sends up to web servers. Fortunately, all you have to do is put a few entries in the registry.
Let’s say you want to add the token “MyIEExtension 1.0.0.0″ to IE’s user-agent string for the current user. Just enter it as the name of a string value (without the quotes, of course) under the registry key:
HKEY_CURRENT_USER\ SOFTWARE\ Microsoft\ Windows\ CurrentVersion\ Internet Settings\ User Agent\ Post Platform
If you want the token to be added to all users, use the same path except put it under HKEY_LOCAL_MACHINE.
Want to know more? Go to “Understanding User-Agent Strings” at MSDN.
