I\'ve been given a task to create a protocol similar to callto:, that - upon clicking on a link with it - would automatically launch an installed aplication.
I followed
if you go to C:\Users\\AppData\Local\Google\Chrome\User Data
You can edit the Local State file
Search for protocol_handler
The syntax here is a key value pair. I usually copy two mailto: and make sure that you set your protocols to false. This will mean that chrome will treat your new protocols as URI_Handler events