Examine source code of Classic Neopets Restorer

{
  "description": "Miss the old Neopets designs? This extension restores the original, non-fist-clenching images for happy, uncustomized Neopets. Relive the nostalgia with classic poses and expressions! If you find missing images, leave a review with a link, and they’ll be added",
  "manifest_version": 2,
  "name": "Classic Neopets Restorer",
  "version": "1.0",
  "web_accessible_resources": [
    "images/*.gif"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.neopets.com/*"
      ],
      "js": [
        "oldify.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a1b8e6de-49bf-4da0-a51d-36ff0b74ab79}"
    }
  }
}