Initial commit

ext/src/content.js

@@ -0,0 +1,12 @@
+"use strict";
+
+document.addEventListener("__castMessageResponse", ev => {
+	browser.runtime.sendMessage(ev.detail);
+})
+
+browser.runtime.onMessage.addListener(message => {
+	const event = new CustomEvent("__castMessage", {
+		detail: JSON.stringify(message)
+	});
+	document.dispatchEvent(event);
+});