Examine source code of FuckRep2

{
  "manifest_version": 2,
  "name": "FuckRep",
  "version": "2.5",
  "description": "Show content on rep.repubblica.it",
  "content_scripts": [
    {
      "matches": [
        "*://rep.repubblica.it/*"
      ],
      "js": [
        "fuckrep.js"
      ]
    }
  ]
}