Examine source code of FuckRep

{
  "manifest_version": 2,
  "name": "FuckRep",
  "version": "2.5resigned1",
  "description": "Show content on rep.repubblica.it",
  "content_scripts": [
    {
      "matches": [
        "*://rep.repubblica.it/*"
      ],
      "js": [
        "fuckrep.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee339760-89a2-47af-b171-672d4b14ef67}"
    }
  }
}