: Firefox Addon to override system name resolution for certain host names? Is there any Firefox plugin that allows to change how Firefox perform name resolution? I want to override the system-wide

@Cooney921

There are many Firefox add-ons that do just this:


HostAdmin
ChangeHosts
SwitchHosts


A search for "Firefox hosts add-on" will yield a whole lot more.

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@Megan663

You don't even need a plugin to do that. You can do it with the proxy settings. Specifically, you can use the proxy auto-configuration option with a PAC file that you create. The PAC file is written in javascript. For you it might look something like this:

function FindProxyForURL(url, host) {
if (host=='www.domain.com'){
return 'PROXY 127.0.0.1:80';
}
// All other domains should connect directly without a proxy
return "DIRECT";
}


Save this as my-proxy.pac file and point the proxy auto-configuration at it.

For more information on proxy autoconfiguration, see wikipedia: en.wikipedia.org/wiki/Proxy_auto-config

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