The proxy auto-config file defines how web browsers and other user agents can automatically choose the appropriate proxy server (access method) for fetching a given URL.
Example 4.2. Using automatic proxying
To use the PAC proxy file on http://us2.indexdata.com:9005/id/cf.pac
user_pref("network.proxy.autoconfig_url", "http://us2.indexdata.com:9005/id/cf.pac");
user_pref("network.proxy.type", 2);
Note: every connector will download the cf.pac for every session. This may create a high load on the server side. You can store also on the local disk.
To use the PAC proxy file on local file system
user_pref("network.proxy.autoconfig_url", "file:///home/wosch/indexdata/cf/engine/src/cf.pac");
user_pref("network.proxy.type", 2);
An example for a proxy auto-config is located in
src/cf.pac.