Examine source code of Meme Queue Manager

{
  "manifest_version": 2,
  "name": "Meme Queue Manager",
  "version": "1.0",
  "description": "Queue up and manage memes to watch in sequence.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9820bcd6-5017-4746-ab15-6b816d7433fb}"
    }
  }
}