Examine source code of Local File Explorer

{
  "name": "Local File Explorer",
  "description": "Local File Explorer",
  "version": "2.1.1",
  "manifest_version": 2,
  "icons": {
    "16": "/assets/app/16.png",
    "32": "/assets/app/32.png",
    "48": "/assets/app/48.png",
    "128": "/assets/app/128.png",
    "144": "/assets/app/144.png",
    "192": "/assets/app/192.png",
    "512": "/assets/app/512.png"
  },
  "author": "malisipi",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "file://*/*"
      ],
      "js": [
        "js/lfe.js"
      ],
      "css": [
        "css/preload.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "assets/mimetypes/*",
    "assets/icons/*",
    "LICENSE*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "local-file-explorer@malisipi.github.io",
      "strict_min_version": "121.0"
    }
  }
}