[enhancement]: Consider allowing external extensions to toggle theme.

I’d like to do some automation with dark reader, but I’ve found that external connections (using chrome.runtime.sendMessage) aren’t handled.

Something like this in the constructor of Messenger:

chrome.runtime.onConnectExternal.addListener(function(port) {
  if (port.name === 'ui' && port.type === 'toggle-current-site') {
    port.onMessage.addListener(function() {
      this.adapter.toggleCurrentSite();
    });
  }
});

and this line to the getMessengerAdapter method in extension.ts:

toggleCurrentSite: () => this.toggleCurrentSite(),

Should be enough to allow this in other extensions:

chrome.runtime.sendMessage('eimadpbcbfnmbkopoojfekhnkhdbieeh', {name: 'ui', type:' toggle-current-site'});

Happy to add a pull request if this is considered worth adding.

[Gusted]

Maybe a simpler version using onMessageExternal API: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/runtime/onMessageExternal

The current version is simple-as-is without possessing any security treat from external possible bad actors. See #3519

[voldemortensen]

That’s a great suggestion, but still doesn’t provide a solution. I can control the screen brightness in a variety of ways. I can’t, however, use my browser to use a dark theme.