Examine source code of Kiln for Polytoria

{
  "manifest_version": 3,
  "name": "Kiln for Polytoria",
  "description": "50+ features. Everything Polytoria should have built in.",
  "version": "2.6.0",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "declarativeNetRequest",
    "contextMenus",
    "scripting"
  ],
  "host_permissions": [
    "https://polytoria.com/*",
    "https://api.polytoria.com/*",
    "https://kiln-api.indexx.dev/*",
    "https://kiln.indexx.dev/*",
    "https://polytoria.trade/api/*",
    "https://polytrack.top/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "index.business.purposes@gmail.com"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "css/*",
        "icon/*",
        "images/*",
        "svgs/*",
        "fonts/*"
      ],
      "matches": [
        "https://polytoria.com/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://polytoria.com/my/*"
      ],
      "js": [
        "content-scripts/account.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/forum/post/*/json",
        "https://polytoria.com/guilds/*/json",
        "https://polytoria.com/store/*/json",
        "https://polytoria.com/u/*/json"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/apiRedirects.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/models/*"
      ],
      "js": [
        "content-scripts/creations.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/forum/*"
      ],
      "js": [
        "content-scripts/forum.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/",
        "https://polytoria.com/guilds/*"
      ],
      "js": [
        "content-scripts/guilds.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/",
        "https://polytoria.com/home"
      ],
      "js": [
        "content-scripts/home.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/inbox"
      ],
      "js": [
        "content-scripts/inbox.js"
      ]
    },
    {
      "matches": [
        "https://kiln.indexx.dev/installed",
        "https://kiln.indexx.dev/rewrite"
      ],
      "js": [
        "content-scripts/kiln.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/create/place/*",
        "https://polytoria.com/places/*"
      ],
      "js": [
        "content-scripts/places.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/u/*",
        "https://polytoria.com/users/*"
      ],
      "js": [
        "content-scripts/profile.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/*"
      ],
      "run_at": "document_start",
      "css": [
        "content-scripts/sitewide.css"
      ],
      "js": [
        "content-scripts/sitewide.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/store/*"
      ],
      "js": [
        "content-scripts/store.js"
      ]
    },
    {
      "matches": [
        "https://polytoria.com/trade/*"
      ],
      "js": [
        "content-scripts/trades.js"
      ]
    }
  ]
}