Examine source code of Kudos Extension

{
  "name": "Kudos Extension",
  "version": "4.6resigned1",
  "manifest_version": 2,
  "description": "Extension to send Kudos",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "kudos.html"
  },
  "icons": {
    "16": "icon16.png",
    "19": "icon19.png",
    "32": "icon32.png",
    "38": "icon38.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5e41ca9c-5978-4b55-8faa-e6df5445d0e3}"
    }
  }
}