Examine source code of Warehouse Puzzle

{
  "manifest_version": 2,
  "name": "Warehouse Puzzle",
  "description": "Classic box-pushing with generated boards. Pick the size and how many boxes, chase your own move record on each numbered board, and watch a worked solution when stuck.",
  "version": "6.9",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1c640b98-c76d-471e-957b-f9597f00bcdb}",
      "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": "Warehouse Puzzle",
    "default_popup": "popup.html",
    "default_icon": {
      "32": "graphics/icon-32.png",
      "48": "graphics/icon-48.png",
      "64": "graphics/icon-64.png"
    }
  },
  "permissions": [
    "storage"
  ]
}