Added button action menu

popup/buttonmenu.js

@@ -0,0 +1,15 @@
+// onclick handler for the "Activate on this page" button
+function activateOnPage() {
+	// Inject content script into active tab
+	browser.tabs.executeScript({file: "/content_scripts/fairlang.js"});
+	
+	// TODO exception handling
+}
+
+// Add event handlers
+document.addEventListener("click", (e) => {
+	if (e.target.id == "activateButton") {
+		activateOnPage();
+	}
+});
+