SessionBox Workstation is a standalone, independent browser which has been created and supported by Box-Labs Ltd. Workstation can only be used with Workstation subscription

You can buy the subscription on the pricing page of SessionBox’s marketing page:

You can decide whether you wish to pay monthly or buy a yearly subscription. 

The subscription itself does not contain any proxies. 

With Workstation subscription you can reach all functions of Premium and Plus memberships, hence you can use all features of the extension if you wish. 

Two operating systems are supported, Windows and MAC OS