Examine source code of Possedex

{
  "manifest_version": 2,
  "name": "Possedex",
  "version": "0.0.4resigned1",
  "description": "Avec le Possedex, apprenez en un clin d'oeil qui se trouve derrière le média que vous êtes en train de lire !",
  "applications": {
    "gecko": {
      "id": "possedex@possedex.info"
    }
  },
  "background": {
    "scripts": [
      "background.js",
      "content.js",
      "install.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "64": "icon-64.png"
  },
  "browser_action": {
    "default_icon": "icon-64.png",
    "default_title": "Possedex",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "notifications",
    "activeTab",
    "webRequest",
    "http://possedex.info/database.json"
  ]
}