Examine source code of Secret Peg Puzzle

{
  "manifest_version": 2,
  "name": "Secret Peg Puzzle",
  "description": "Deduce a secret arrangement of coloured pegs in as few rows as possible. Feedback counts exact matches and misplaced colours, with correct handling of repeats, and a built-in solver you can lean on when stuck.",
  "version": "7.5.9",
  "browser_specific_settings": {
    "gecko": {
      "id": "{86bdf1ad-7cab-4cb5-9bce-ad27fa81456b}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "graphics/icon-32.png",
    "48": "graphics/icon-48.png",
    "64": "graphics/icon-64.png",
    "96": "graphics/icon-96.png",
    "128": "graphics/icon-128.png"
  },
  "browser_action": {
    "default_title": "Secret Peg Puzzle",
    "default_popup": "popup.html",
    "default_icon": {
      "32": "graphics/icon-32.png",
      "48": "graphics/icon-48.png",
      "64": "graphics/icon-64.png"
    }
  },
  "permissions": [
    "storage"
  ]
}