It's very difficult to understand and trace Calling a callback of released renderer view errors, which are caused by passing functions to remote and then releasing the window.

These changes make it easy to debug and fix these by changing the "ID" used to track the functions. The callbacks-registry uses (new Error).stack to identify the file and line number where the function was passed to a remote call, and includes that in the ID.

index.html:

      var callback = function() {
        console.log("Run some code!");
      };
      app.on('browser-window-focus', callback); << line 16

The new exceptions look like this: