Examine source code of Greek Beta Code Converter

{
  "manifest_version": 2,
  "name": "Greek Beta Code Converter",
  "short_name": "Greek Beta",
  "description": "Convert Greek beta code to Greek characters and vice versa.",
  "version": "1.0.8",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "Greek Beta Code Converter"
  },
  "permissions": []
}