Потрібен браузер Opera.
Ліцензування
EnvSwitcher is provided free of charge for personal and commercial use. The source code of EnvSwitcher is publicly available and open for viewing. All rights to this software and its source code remain the sole intellectual property of the author. No part of the software or its source code may be reproduced, redistributed, or modified in any form without the explicit, written permission of the author.