Examine source code of YouTube™ Livestream Mode

{
  "manifest_version": 2,
  "name": "Enhance Youtube™ Livestream",
  "short_name": "Enhance Youtube™ Livestream",
  "description": "Enhance Youtube™ Livestream",
  "version": "1.0.3resigned1",
  "author": "matico",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "data/*.json"
  ],
  "browser_action": {
    "default_icon": "icon/enable.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1760590b-8374-412d-951b-3a1f4e2e038c}"
    }
  }
}