Examine source code of Panchang Extension

{
  "manifest_version": 2,
  "name": "Panchang Extension",
  "version": "2.0",
  "description": "This is a panchang Extension that shows tithi, vaar, nakshatra, etc of today. Other stuff will be added shortly. Thank you!!!",
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": "panchangExtension.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d75b3a0-3ee3-4e63-acf9-d7f0f6d572bc}"
    }
  }
}