How to launch a Standalone Unity Application PC/Osx by clicking on a hyperlink in any browser ?

I am working on a Crossplatform Application developed using Unity 3D , Currently I require to launch the standalone Application, by clicking on the link provided to the user on a website on both windows based PC(win7 and higher) and OSx.So as they click the link the application (assuming to be already installed on the system) gets launched. Also while launching the app I need to send at least two variable values 'string' and an 'int' into the app,. Can anybody please guide me how to achieve this ?