Examine source code of Battles Replay

{
  "manifest_version": 3,
  "name": "Battles Replay",
  "version": "2.5.1",
  "description": "The ultimate Twitch & Kick companion for downloading VODs, discovering unpublished streams, recording live broadcasts with rolling buffers, and watching with synchronized chat replay.",
  "browser_specific_settings": {
    "gecko": {
      "id": "battles-replay@teambattles.gg",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "Battles Replay"
  },
  "permissions": [
    "storage",
    "downloads",
    "tabs",
    "identity",
    "scripting",
    "cookies",
    "alarms",
    "activeTab",
    "notifications"
  ],
  "host_permissions": [
    "*://*.twitch.tv/*",
    "*://id.twitch.tv/*",
    "*://usher.ttvnw.net/*",
    "*://gql.twitch.tv/*",
    "*://api.twitch.tv/*",
    "*://vod-metro.twitch.tv/*",
    "*://vod-secure.twitch.tv/*",
    "*://*.ttvnw.net/*",
    "*://*.cloudfront.net/*",
    "*://sullygnome.com/*",
    "*://teambattles.gg/*",
    "*://*.kick.com/*",
    "*://id.kick.com/*",
    "*://api.kick.com/*",
    "*://*.live-video.net/*",
    "*://*.youtube.com/*",
    "*://*.instagram.com/*",
    "*://*.tiktok.com/*",
    "*://*.twitter.com/*",
    "*://*.x.com/*",
    "*://*.reddit.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*",
        "https://www.kick.com/*",
        "https://kick.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "auth-callback.html",
        "auth-callback.js",
        "assets/*",
        "chunks/*",
        "ffmpeg/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'"
  }
}