Freedom for web is a standalone webphone that requires a Salesforce chatter free license and Natterbox licenses and can then be access by going to https://freedom.natterbox.com/
The interface looks like this:

This Webphone will use a tab within your browser. Here is our full tutorial video:
Natterbox's newest user interface for voice communications that works within Salesforce, in a web browser, and on mobile.
Web-based applications that allow you to make phone calls directly in your Internet browser.
Sometimes referred to as the 'blue box' by agents. This window needs to be open to allow an agent to make and receive calls.