I am trying to provide a way to send a url in chrome to a program/application on the user's desktop through a chrome extension. More specifically, I would like to create a chrome application that, when activated, will send the url (most likely from youtube) that the user has open, to a program on the desktop that will rip music from youtube videos. The desktop program is working and is written in python, all I want to be able to do now is click a button in chrome (chrome extension) and have the url of the website be sent to the desktop application. The only way that I know of that would let me do this is to use NPAPI but it is being phased out.
You could use Native Messaging which would require you to setup the desktop application as a native messaging host.
Then you can use the chrome.runtime API with commands like connectNative, sendNativeMessage etc