you need the link from what ever browser you wish to use eg chrome right click on the icon and select properties and you should see

The fastest way is to make a new shortcut by right clicking on blank area of the desktop and selecting new then shortcut

Once you have pasted the application information you need to make a space and type in the URL of the web site or past the link on to the end and click next 

Give it a name and click finish and you are done the link will open the browser you have selected no matter what your default browser is.