I was lucky to find that utility early on. It helped me to network from my girlfriend's workplace fairly quickly. It may also be valuable on public computers. Putting it on the utility list, or even in the PortableApps Suite would be awesome. Maybe give it a cool name... 
For anybody who hasn't found it yet, here is the link: https://portableapps.com/downloads/ProxyGet.exe
 
      
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