Examine source code of Scrollbar Fixer

{
  "manifest_version": 3,
  "name": "Scrollbar Fixer",
  "version": "1.0",
  "description": "Automatically shifts overlapping scrollbars slightly to make both visible and easy to use.",
  "author": "Francesco Cortini",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@scrollbar-fixer",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}