What is the Default proxy?
The Default Proxy defines the settings used to load any resource or web page that doesn’t match a whitelisted pattern. In other words, the Default Proxy is a catchall. When first installed, FoxyProxy automatically configures the Default Proxy so that pages load through your direct internet connection (i.e., it’s not using a proxy at all). However, you can change this setting to use any proxy server or PAC file you like, just like any other proxy settings in FoxyProxy.