The "GeoEdge" extension built into Fiddler
is designed for exactly this scenario.
Most geo-extensions work by routing your traffic through their proxy servers in the target locales; in order for them to work properly with Fiddler, they need to allow you to send your traffic through Fiddler first
before it is sent to the remote proxy server. You'll need to ask the providers of Hola whether this is a scenario that they support.
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