need to package onEngagementLoad as you are not allowed to eval() inside of an extension

browser-extension/manifest.json

@@ -6,18 +6,30 @@
   "background": {
     "service_worker": "service-worker.js"
   },
-   "side_panel": {
-      "default_path": "src/pages/side-panel/index.html"
-   },
+  "side_panel": {
+    "default_path": "src/pages/side-panel/index.html"
+  },
   "permissions": ["sidePanel", "storage"],
   "content_security_policy": {
     "extension_pages": "script-src 'self'; object-src 'self'"
   },
-  "action": {
-    "default_icon": "icon.png"
+  "icons": {
+    "16": "images/icon-16.png",
+    "32": "images/icon-32.png",
+    "48": "images/icon-48.png",
+    "128": "images/icon-128.png"
   },
-   "web_accessible_resources": [ {
-      "matches": [ "*://*/*" ],
-      "resources": [ "assets/js/*.js", "assets/css/*.css", "assets/svg/*.svg", "assets/png/*.png", "icon.svg", "blob/*" ]
-   } ]
+  "web_accessible_resources": [
+    {
+      "matches": ["*://*/*"],
+      "resources": [
+        "assets/js/*.js",
+        "assets/css/*.css",
+        "assets/svg/*.svg",
+        "assets/png/*.png",
+        "icon.svg",
+        "blob/*"
+      ]
+    }
+  ]
 }