Configuring the proxies
Configuring the proxies in Apple Safari
Sadly Apple's Safari does not support Web Proxy Autodiscovery Protocol (WPAD).
Call up System Preferences and Network.
In the list next to Locations select New Location…:
A sub-window with the prompt Name the new Location opens up. Enter
WPAD:
Click OK. From the list next to Display select either
AirPort (for wireless connection) or Ethernet (if you have connected your computer via a network cable) and then Proxies.
From the list next to Configure proxies the setting Use PAC-file and next to PAC-file URL the URL http://wpad/wpad.dat:
Afterwards click Apply.
Configuring the proxies in Firefox
Open Options, click on Advanced and select Network:
Click on Settings::
Select
Auto-detect proxy settings for this network and click OK.