Examine source code of MegadedeFiltro

{
  "manifest_version": 2,
  "name": "MegadedeFiltro",
  "version": "1.1resigned1",
  "description": "Añade filtros a megadede para una mejor navegación.",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.megadede.com/*"
      ],
      "js": [
        "megafiltro.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/icon32.png"
    },
    "default_title": "Filtros",
    "default_popup": "popup.html"
  },
  "applications": {
    "gecko": {
      "id": "72blau@gmail.com"
    }
  }
}