Network Proxy

I try to apply a wpad.dat rules with "network proxy" configuration tools.

System:preference:Network Proxy
Automatic proxy configuration URL: http://www.server.domain/wpad.dat

The rules works for firefox, but not for konqueror or opera web browser.

I search to know which kind of application is impacted by the "Network Proxy" configuration ?

How can I apply the wpad.dat rules to the entire computer and for all users ?