Examine source code of KRL_STREAM

{
  "manifest_version": 2,
  "name": "KRL_STREAM",
  "description": "L'extension qui t'informe si KRL est en LIVE sur Twitch !",
  "version": "0.9.2",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "*://*.krl.tiibz.dev/*",
    "*://*.ytimg.com/*",
    "*://*.hltv.org/*",
    "*://static-cdn.jtvnw.net/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "krl_stream-extension@tiiBz"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "KRL_STREAM",
    "default_popup": "popup.html"
  }
}