Leaking browser history

Konqueror does something lik this intelligently already. For "Open new 
windows", you can choose "Allow", "Ask", "Deny" and "Smart". They also 
have an "Allow" and "Ignore" for:

1. Resize window
2. Move window
3. Focus window
4. Modify status bar text

Presumably, they could add a 5:

5. Examine URL history