Examine source code of Time Zone Converter

{
  "manifest_version": 2,
  "name": "Time Converter",
  "version": "1.1resigned1",
  "description": "asdasd",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "replacer.js",
        "timeconverter.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f12dfaeb-c9e6-475d-9d1b-cb986aed47a6}"
    }
  }
}