Examine source code of VPN Detourer

{
  "manifest_version": 2,
  "name": "VPN Detourer",
  "version": "0.1.0",
  "description": "Redirect configured source domains to target domains while preserving the rest of the URL.",
  "icons": {
    "16": "assets/icon.svg",
    "32": "assets/icon.svg",
    "48": "assets/icon.svg"
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c7c90838-4e1c-47aa-980c-095d2bb3c89d}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "page": "background.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icon.svg",
      "32": "assets/icon.svg"
    },
    "default_title": "VPN Detourer",
    "default_popup": "popup.html"
  }
}