this is 9.1, ergo there is no CCR, nor is there an advanced license for sale (although a pre-existing one will still give you ability to run contactstore.)
Assuming you don't already have an Advanced license on the IPO, you need one of these:
275623 IPO R9 CONTACTSTORE ADI LIC Messaging Recordings Administrator
This will permit you to run either ContactStore (windows server) or ContactRecorder (Linux app server).
As IPOfficeGuru noted, it would be strongly recommended that that you use the Linux app server, spec'd out with an additional HDD to store recordings on. All current and future development of recording software is being done on ContactRecorder... there hasn't been an update to ContactStore for years now.
It's a web page to access the recording database, so the person searching can be running any browser, although IE11 is required to permit install of the verint tolls required to play the recordings in the browser.
GB