Examine source code of Letters Converter

{
  "manifest_version": 2,
  "name": "Letters Converter",
  "version": "1.2resigned1",
  "description": "Convert Letters(English Only) to Arabic Characters and Vice Versa",
  "icons": {
    "48": "icons/switch.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup/page.html",
    "default_icon": {
      "64": "icons/switch.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{50e194fb-928b-49ce-a499-356151be25b2}"
    }
  }
}