Examine source code of sbhelper

{
  "description": "Adds hint info and word totals to NYT Spelling Bee",
  "manifest_version": 2,
  "name": "sbhelper",
  "version": "1.1",
  "author": "Sarah Connor",
  "homepage_url": "https://github.com/terminatingcode/sbhelper",
  "icons": {
    "48": "icons/sbhelper.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.nytimes.com/puzzles/spelling-bee*"
      ],
      "js": [
        "hinter.js"
      ],
      "css": [
        "hinter.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6e5cbd94-bc28-4759-8e4f-a22a124f4b7b}"
    }
  }
}