Examine source code of Chat Enhancer for YouTube

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionShortName__",
  "version": "0.22.18",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.youtube.com/live_chat*",
    "https://www.youtube.com/live_chat_replay*",
    "https://studio.youtube.com/live_chat*",
    "https://studio.youtube.com/live_chat_replay*",
    "https://playground.chatenhancer.com/*",
    "https://translate.googleapis.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "__MSG_extensionName__",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-inactive-16.png",
      "32": "icons/icon-inactive-32.png",
      "48": "icons/icon-inactive-48.png",
      "128": "icons/icon-inactive-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/live_chat*",
        "https://www.youtube.com/live_chat_replay*"
      ],
      "js": [
        "lite-mode-bootstrap.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "https://www.youtube.com/live_chat*",
        "https://www.youtube.com/live_chat_replay*",
        "https://studio.youtube.com/live_chat*",
        "https://studio.youtube.com/live_chat_replay*"
      ],
      "js": [
        "chat-feed-page.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.youtube.com/live_chat*",
        "https://www.youtube.com/live_chat_replay*",
        "https://studio.youtube.com/live_chat*",
        "https://studio.youtube.com/live_chat_replay*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "games/*/*.mp3",
        "games/*/*.json",
        "games/*/*.otf",
        "games/*/*.png",
        "games/*/*.ttf",
        "games/*/*.webp",
        "locales/*.json"
      ],
      "matches": [
        "https://www.youtube.com/*",
        "https://studio.youtube.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "chat-enhancer-for-youtube@chat-enhancer-yt.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personalCommunications"
        ]
      }
    }
  }
}