Hi, I'm locking our proxy settings to our users with Autoconfig and this settings: lockPref("network.proxy.type", 2); lockPref("network.proxy.autoconfig_url", "http://example.intranet/proxy.pac"); That locks the proxy configuration in a standard Firefox installation, but it's easy to bypass using addons like FoxyProxy (there are much addons like that). How can I secure lock the proxy configuration? Thx