Examine source code of TubeSize

{
  "manifest_version": 3,
  "name": "TubeSize",
  "version": "2.3.2",
  "description": "View file size data for YouTube videos across different quality levels.",
  "icons": {
    "16": "public/icons/icon-16.png",
    "32": "public/icons/icon-32.png",
    "48": "public/icons/icon-48.png",
    "128": "public/icons/icon-128.png"
  },
  "action": {
    "default_icon": {
      "48": "public/icons/icon-48.png"
    },
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "js": [
        "assets/content.ts-loader-CfE_VE0b.js"
      ],
      "matches": [
        "https://*.youtube.com/*",
        "https://*.twitch.tv/*",
        "https://*.kick.com/*"
      ],
      "css": [
        "assets/content-ClbF2Z3d.css"
      ]
    },
    {
      "js": [
        "assets/observer.ts-loader-qMzkA1Qg.js"
      ],
      "matches": [
        "https://*.youtube.com/*"
      ]
    }
  ],
  "background": {
    "type": "module",
    "scripts": [
      "service-worker-loader.js"
    ]
  },
  "host_permissions": [
    "https://*.youtube.com/*",
    "https://*.twitch.tv/*",
    "https://gql.twitch.tv/*",
    "https://usher.ttvnw.net/*",
    "https://*.playlist.ttvnw.net/v1/playlist/*",
    "https://*.cloudfront.hls.ttvnw.net/v1/segment/*",
    "https://*.kick.com/*",
    "https://*.playback.live-video.net/*",
    "https://*.cloudfront.hls.live-video.net/v1/*"
  ],
  "permissions": [
    "activeTab",
    "storage"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+P",
        "mac": "Alt+P"
      },
      "description": "Open the TubeSize popup"
    }
  },
  "web_accessible_resources": [
    {
      "matches": [
        "https://*.kick.com/*",
        "https://*.twitch.tv/*",
        "https://*.youtube.com/*"
      ],
      "resources": [
        "assets/cache-B-LA9XzV.js",
        "assets/formatting-iAwD2CoH.js",
        "assets/kick-DXP0Rk3_.js",
        "assets/content.ts-DeGpGVja.js"
      ],
      "use_dynamic_url": false
    },
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "resources": [
        "assets/cache-B-LA9XzV.js",
        "assets/badge-nNQcu5sv.js",
        "assets/observer.ts-BPhpfeYv.js"
      ],
      "use_dynamic_url": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tubesize@mohammedsayed.dev",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}