Examine source code of Tools for BTTV (beta)

{
  "manifest_version": 3,
  "name": "Tools for BTTV (beta)",
  "description": "Extra features for emote management in BetterTTV and FrankerFaceZ",
  "version": "1.1.1",
  "version_name": "1.1 beta",
  "author": "brilliantdrink",
  "icons": {
    "16": "icons/tfb-logo_16.png",
    "32": "icons/tfb-logo_32.png",
    "48": "icons/tfb-logo_48.png",
    "128": "icons/tfb-logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tools-for-bttv@b-dr.ink",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "authenticationInfo"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "js": [
        "tools-for-bttv.js"
      ],
      "css": [
        "tools-for-bttv.css"
      ],
      "matches": [
        "*://betterttv.com/*",
        "*://www.frankerfacez.com/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'"
  }
}