using my boilerplate yuh

src/background/events/onUpdate.ts

@@ -0,0 +1,10 @@
+import { hotReloadTab } from 'src/background/util/hotReloadTab';
+
+/**
+ * Called when the extension is updated (or when the extension is reloaded in development mode)
+ */
+export default function onUpdate() {
+    if (process.env.NODE_ENV === 'development') {
+        hotReloadTab();
+    }
+}