Examine source code of ytcFilter

{
  "manifest_version": 3,
  "name": "YtcFilter - YouTube Chat Filter",
  "homepage_url": "https://livetl.app/ytcfilter/",
  "description": "The most powerful and intuitive YouTube chat filter extension.",
  "version": "3.1.2",
  "icons": {
    "48": "assets/logo-48.png",
    "128": "assets/logo-128.png"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "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*"
  ],
  "content_scripts": [
    {
      "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": [
        "scripts/chat-injector.js"
      ],
      "css": [
        "stylesheets/titlebar.css"
      ],
      "all_frames": true
    },
    {
      "matches": [
        "https://www.youtube.com/embed/ytcfilter_embed?*"
      ],
      "js": [
        "scripts/chat-mounter.js"
      ],
      "css": [
        "stylesheets/scrollbar.css",
        "stylesheets/page404.css"
      ],
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "scripts/chat-background.js"
    ]
  },
  "action": {
    "default_icon": {
      "48": "assets/logo-48.png",
      "128": "assets/logo-128.png"
    },
    "default_popup": "options.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20f2dcdf-6f8d-4aeb-862b-b13174475d9c}",
      "strict_min_version": "115.0"
    }
  }
}