Examine source code of Dark Mode for Reddit

{
  "manifest_version": 2,
  "name": "Dark Mode for Reddit",
  "version": "1.0",
  "description": "Clean dark mode for Reddit",
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-dark-mode@petar.com",
      "data_collection_permissions": {
        "interaction_data": false,
        "usage_data": false,
        "required": [
          "none"
        ]
      }
    }
  },
  "developer": {
    "name": "Petar"
  }
}