Examine source code of Live with Clear Purpose

{
  "manifest_version": 2,
  "name": "Live with Clear Purpose",
  "version": "1.0",
  "description": "Inspiring quotes to guide you toward a purpose-driven life.",
  "permissions": [],
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "128": "images/clear-logo.png"
    }
  },
  "icons": {
    "128": "images/clear-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{225fd693-3cdb-4649-a187-cf2d434e5610}"
    }
  }
}