Examine source code of Host File Override Plugin

{
  "manifest_version": 3,
  "name": "Host File Override Plugin",
  "version": "0.0.1",
  "description": "Host File Override Plugin (0.0.1-alpha) - A simple Firefox plugin to map hostnames to IP addresses, like a virtual hosts file.",
  "permissions": [
    "proxy",
    "storage",
    "webRequest"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.svg"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "host-file-override@sgm.tools",
      "strict_min_version": "149.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}