Examine source code of Cosmic Nebula Experience

{
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Cosmic Nebula Experience",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; base-uri 'self'; connect-src 'self'; img-src 'self' data:; style-src 'self';",
  "name": "Cosmic Nebula Experience",
  "permissions": [
    "storage"
  ],
  "version": "1.0.0",
  "author": "XMP",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cosmic-nebula-experience@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "Transform your browser with a mesmerizing cosmic nebula experience. Immerse yourself in swirling space clouds.",
  "homepage_url": "https://github.com/xmp/cosmic-nebula-experience",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  }
}