Examine source code of arhn.eu - Wtyczka Twitch

{
  "name": "arhn.eu - Wtyczka Twitch",
  "version": "1.0.3",
  "manifest_version": 2,
  "description": "Ta wtyczka informuje o aktywnych livestreamach serwisu arhn.eu!",
  "homepage_url": "https://arhn.eu",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "js/jquery/jquery.min.js",
      "src/bg/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icons/icon19.png",
    "default_title": "arhn.eu - Livestreamy",
    "default_popup": "src/browser_action/browser_action.html"
  },
  "permissions": [
    "notifications",
    "storage",
    "https://arhn.eu/*"
  ],
  "applications": {
    "gecko": {
      "id": "twitchext@arhn.eu",
      "strict_min_version": "55.0"
    }
  }
}