Examine source code of Dark Mode Enhancer

{
  "manifest_version": 2,
  "name": "Dark Mode Enhancer",
  "version": "2.0",
  "description": "Toggles between optimized dark mode and light mode.",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4a50234f-5417-4abe-8dad-bb1dbcab5d16}"
    }
  }
}