Examine source code of Enhancer for Netflix DEC

{
  "manifest_version": 2,
  "name": "Enhancer for Netflix – Declaration V2",
  "version": "1.3",
  "description": "Enhance your Netflix experience with playback speed, subtitle styling, dark mode, auto skip intro, and more.",
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.netflix.com/*"
      ],
      "js": [
        "enhancer.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_action": {
    "default_title": "Enhancer for Netflix",
    "default_icon": "icons/logo_64.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{40ce38d0-8d2d-45f0-8ef0-e1bfa400312f}"
    }
  }
}