Examine source code of BeeCheating

{
  "description": "Get today's complete spelling bee word list and total word count, without waiting for tomorrow.",
  "manifest_version": 2,
  "name": "BeeCheating",
  "version": "1.3",
  "homepage_url": "https://www.murchie.com/beecheating",
  "icons": {
    "16": "Icon-16.png",
    "32": "Icon-32.png",
    "48": "Icon-48.png",
    "64": "Icon-64.png",
    "96": "Icon-96.png",
    "128": "Icon-128.png",
    "256": "Icon-256.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "page_action": {
    "default_icon": "Icon-32.png",
    "default_title": "BeeCheating",
    "default_popup": "beecheat.html",
    "show_matches": [
      "https://www.nytimes.com/puzzles/spelling-bee*"
    ]
  }
}