Examine source code of Spelling Bee Assistant

{
  "manifest_version": 2,
  "name": "Spelling Bee Assistant",
  "description": "Spelling Bee Assistant is an add-on for Spelling Bee, the New York Times’ popular word puzzle",
  "homepage_url": "https://spelling-bee-assistant.app/",
  "version": "4.3.0",
  "content_scripts": [
    {
      "matches": [
        "https://www.nytimes.com/puzzles/spelling-bee*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "64": "assets/icon64.png",
    "128": "assets/icon128.png"
  },
  "web_accessible_resources": [
    "spelling-bee-assistant.js"
  ],
  "permissions": [
    "https://www.nytimes.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4474f7b5-4da5-4332-8847-074f35456496}",
      "strict_min_version": "68.0"
    }
  }
}