Create a portable app/site specific browser app - both windows and mac

I am trying to distribute an online directory we have as a stand-alone native application. So we essentially need a site-specific browser that launches this specific website. We need this created for both, mac and windows. Requirements of the software: 1 - Custom name (we will provide) 2 - Custom icon (we will provide) 3 - Ability to be stand-alone. So the user will simply download this onto their desktop and be able to launch it without having to install it. About your bid and payment: - 100% milestone created, payment on completion and not before (so I will test if the requirements above are met) - To ensure you have read this properly before submitting, make sure you tell me which platform you are bidding for, mac, windows or both. - Also in your bid, include exactly what language you intend to create this (or which existing application you will use to create this) - I don't mind if you use existing open source software to create this (e.g. Mono/JavaFX) or even if you manage to find current applications that do this already. I'll pay you anyway.