Examine source code of Netflix Timer

{
  "manifest_version": 2,
  "name": "Netflix Sleep Timer",
  "version": "1.3",
  "description": "Netflix Sleep Timer allows you to automatically pause or close Netflix after a set time or when a new episode starts. Perfect for controlling your binge-watching habits or settings limits for kids without you having to monitor time or episode changes.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+N"
      },
      "description": "Open Netflix Timer popup"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Netflix Sleep Timer",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.netflix.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icons/icon-128.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "netflix-timer@example.com",
      "strict_min_version": "58.0"
    }
  }
}