Examine source code of LoL Boards notifications

{
  "manifest_version": 2,
  "name": "LOL Boards notifications",
  "version": "0.4resigned1",
  "content_scripts": [
    {
      "matches": [
        "*://*.leagueoflegends.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d0d2b53-b622-4d94-972c-e18131b66af4}"
    }
  }
}