Examine source code of Cursor Aura

{
  "manifest_version": 2,
  "name": "Cursor Aura",
  "version": "1.0",
  "description": "Leaves a light aura or sparkling trail behind the cursor as you move.",
  "permissions": [
    "activeTab",
    "<all_urls>",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_title": "Cursor Aura",
    "default_popup": "popup.html",
    "default_icon": "icons/icon48.png"
  },
  "icons": {
    "48": "icons/icon48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f036936-925c-4664-9dcb-e1b761fe461c}"
    }
  }
}