I'm going to create a Chrome extension that will get some data from my SalesForce Rest service. I need to add the OAuth2 authorization to this service. How to correctly set up such a service via a connected application in SalesForce? Most commonly I don't know what I should add to the "Callback URL" field. And I actually didn't find a good explanation of what to do if you're doing this with your service hosted in SalesForce. Does anybody try to do this via a Chrome extension?