YouTube Live チャット欄デフォルト非表示

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "YouTube Live チャット欄デフォルト非表示",
  "description": "YouTube Live のチャット欄をデフォルトで非表示にする。",
  "version": "1.1.0",
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_icon": "images/icon16.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "tabs"
  ]
}