Examine source code of SwipeToNavigate

{
  "content_scripts": [
    {
      "js": [
        "jquery-3.4.1.js",
        "jquery.mousewheel.js",
        "swipe2nav.js"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "description": "Add two finger swip for navigating browser history.",
  "name": "SwipeToNavigate",
  "version": "0.3.0",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{bc5ae657-5db8-4f8a-b558-e7343e127fee}"
    }
  }
}