Examine source code of NoGamble TTV

{
  "manifest_version": 3,
  "name": "NoGamble TTV",
  "description": "Hides gambling-promoting streamers and categories from Twitch and Kick. No setup, no account.",
  "version": "0.3.7",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "homepage_url": "https://www.nogamblettv.app",
  "browser_specific_settings": {
    "gecko": {
      "id": "nogamble-ttv@nogamblettv.app",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.twitch.tv/*",
    "https://kick.com/*",
    "https://www.nogamblettv.app/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "https://kick.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/kick.js"
      ]
    }
  ]
}