Examine source code of D4rk D0cs

{
  "name": "Google Docs Dark Mode",
  "version": "1.2.3",
  "description": "Dark mode for Google Docs!",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/document/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "128": "icon_128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    "css/dark_mode_docs.css",
    "css/darkModeSheet.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a6ca3065-2cf7-4159-89f8-da92bbab1058}"
    }
  }
}