After installation, the Firefox profile in which the add-on was installed can only access Proton Mail. All other URLs are redirected to Proton Mail.
This add-on provides the user with no options or configuration settings. It is intended solely as a building block for custom context-bound browser apps.
![Podgląd „Hardcoded-Whitelist [WhatsApp]”](https://addons.mozilla.org/static-server/img/addon-icons/default-64.png){kind=icon}