Examine source code of NewTab Adapter

{
  "author": "gdh1995@qq.com",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "newtab-adapter@gdh1995.cn",
      "strict_min_version": "63.0"
    }
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "content_security_policy": "script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none'; connect-src 'none'",
  "default_locale": "en",
  "description": "__MSG_description__",
  "homepage_url": "https://github.com/gdh1995/vimium-c-helpers/tree/master/newtab",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "incognito": "spanning",
  "manifest_version": 2,
  "name": "__MSG_name__",
  "options_ui": {
    "page": "options.html",
    "chrome_style": true,
    "open_in_tab": false
  },
  "version": "1.3.0",
  "web_accessible_resources": [
    "vomnibar*"
  ]
}