The "WPAD" return type should work similarly to the auto_detect proxy mode in the Chrome API, which takes the proxy configuration from a PAC script that can be downloaded at http://wpad/wpad.dat. For more information, see the proxy API design document: https://docs.google.com/document/d/1W45o5X2bFRPrTaQDFp9IzTJ8njCVfEgyENS7i2owaUI/edit?usp=sharing
How is this fixed/resolved? Is it already supported by the implementation in bug #1295807?
This should become a new return type as part of bug 1381290.