Examine source code of Horus

{
  "name": "Horus",
  "version": "0.1.3",
  "manifest_version": 2,
  "description": "Auditez vos environnements numériques et reprenez le contrôle ! Participez à l'enquête ISC-PIF/CNRS",
  "permissions": [
    "storage",
    "alarms",
    "tabs"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "html/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "js/twitter.js"
      ]
    },
    {
      "matches": [
        "*://*.google.com/*",
        "*://*.google.fr/*"
      ],
      "js": [
        "js/google.js"
      ]
    },
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "js/youtube.js"
      ]
    },
    {
      "matches": [
        "https://www.facebook.com/*"
      ],
      "js": [
        "js/facebook.js"
      ]
    }
  ],
  "options_ui": {
    "page": "html/settings.html"
  },
  "icons": {
    "32": "images/active_icon32.png",
    "128": "images/active_icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6afdad14-2cab-428a-bba7-0593320a35be}"
    }
  }
}