The new self service 3.0 will take you to new tab and you cant  go back to Salesforce/Setup.

Not using just Remedyforce so going away from Salesforce or not having ability to get back is not ideal.

Workaround- click back on browser

more - workarounds https://communities.bmc.com/message/679024?et=watches.email.thread#679024

Submitted for customers