Examine source code of RotSwat - Say goodbye to brainrot

{
  "manifest_version": 3,
  "name": "RotSwat - Say goodbye to brainrot",
  "short_name": "RotSwat",
  "version": "0.2",
  "description": "Get rid of the brain rot words your kids are saying on the web.",
  "author": "Alex K",
  "developer": {
    "name": "Alex K",
    "url": "https://www.rotswat.com/"
  },
  "homepage_url": "https://www.rotswat.com/",
  "options_ui": {
    "page": "settings/settings.html"
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "action": {
    "default_icon": {
      "16": "images/toolbar-16.png",
      "24": "images/toolbar-24.png",
      "32": "images/toolbar-32.png"
    },
    "default_title": "RotSwat",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "assets/browser-polyfill.js",
        "main/mutation.js"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "match_origin_as_fallback": true,
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "assets/browser-polyfill.js",
      "background/background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "public_assets/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c795406-c72e-48b1-9d88-3b66fe14b4fe}",
      "strict_min_version": "128.0"
    },
    "gecko_android": {
      "strict_min_version": "128.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.rotswat.com/data/wordlist.json"
  ]
}