Examine source code of Translator

{
  "manifest_version": 2,
  "name": "Translator",
  "description": "Lightweight tool for translating selected text. Select text and press T or choose Translate in context menu",
  "version": "1.3",
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "main.js"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "artemijdeleto@gmail.com"
    }
  }
}