The web application we develop is doing certain things depending on the domain and subdomains in the address. To be able to develop and test everything on a local environment, one would need to bind the domains to, using the hosts file.

However, this would cut that machine off from accessing the live server domains.

Question: Is there a browser-level hack that allows one to do hosts-like stuff, only for that browser?

UPDATE: A proxy .pac file can do this just fine. Like this:

function FindProxyForURL(url, host) {
      if (shExpMatch(url,"*.example.com/*")){
         return "PROXY";



You can do pretty clever things with a proxy auto-config file. Try one that returns PROXY for the domains you want affected and DIRECT for the rest.

  • This works great! And with an extension like Proxy Switchy for Chrome I'm all set. Thanks! – Gabriel R. Dec 6 '10 at 13:48

Maybe there's a HTTP proxy that will do what you want?

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