It does exactly what it claims, in the background, but always active. But much more impressive: this company's support is beyond any expectation. For the uninitiated installation can be a bit daunting and tricky, but absolutely nothing is too much for them to help you along, both "in the background", and interactively (by way of hand holding through chats).
They also solve any compatibility issues with other extensions fast, competently and without fuss.
Overbeeke & Partners BV