Examine source code of PubliElectoral Plugin

{
  "name": "__MSG_appName__",
  "version": "0.0.31",
  "manifest_version": 2,
  "description": "__MSG_storeDescription__",
  "default_locale": "es",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "36": "icons/icon-36.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "*://*.facebook.com/",
    "*://*.facebook.com/home.php",
    "*://*.facebook.com/?ref=logo",
    "storage"
  ],
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/",
        "*://*.facebook.com/home.php",
        "*://*.facebook.com/?ref=logo"
      ],
      "js": [
        "scripts/contentscript.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "36": "icons/icon-36.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "__MSG_appName__",
    "default_popup": "popup.html"
  },
  "applications": {
    "gecko": {
      "id": "publielectoralplugin@adc.org.ar"
    }
  }
}