Examine source code of Yannextension

{
  "name": "Yannextension",
  "manifest_version": 2,
  "version": "1.2",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "description": "Sois au courant lorsque ton streameur préféré est en live !",
  "browser_action": {
    "default_icon": "offlineIcon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "notifications",
    "tabs"
  ],
  "icons": {
    "128": "white_yannex.png"
  },
  "background": {
    "scripts": [
      "liveCheck.js"
    ]
  }
}