Examine source code of GoFile Volume Controller

{
  "manifest_version": 3,
  "name": "Gofile Volume Controller",
  "version": "2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "gofile-volume@extension.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "*://gofile.io/*"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://gofile.io/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}