Examine source code of Hololive Now

{
  "name": "hololive-now",
  "description": "放送中のチャンネルと予約枠までのカウントダウンを表示します。Shows the currently live channels and also counts down to upcoming frames from Hololive",
  "version": "1.0.0",
  "manifest_version": 2,
  "icons": {
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "browser_action": {
    "default_title": "Watch Hololive",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_idle",
      "js": [
        "./content/content.js"
      ],
      "css": [
        "./content/content.css"
      ],
      "matches": [
        "https://www.youtube.com/*"
      ]
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "chrome_style": true
  },
  "web_accessible_resources": [
    "images/*/*.png"
  ],
  "permissions": [
    "*://api.holotools.app/*"
  ]
}