If you are connected to the internet via a proxy server, then TweakMASTER is able to optimize only the first ‘leg’: the connection between your computer and the proxy server. Therefore, optimization options are limited and depend on how good your connection to that proxy server is. If your proxy service uses compression or caching or other tricks to provide a faster connection, you may benefit from it as well as from TweakMASTER. TweakMASTER is complimentary to the proxy service and is usually fully compatible. You will still benefit from all other TweakMASTER handy functions, or course.