your best bet is probably a PC connected to your TV with an HDMI cable. Then you can use the web interface.
There are no Smart TV apps available for Fibe TV.
Keep in mind that there are a few limitations of using the Fibe TV app compared to a Fibe receiver.
1. Any programs you watch through an app will count as internet data against your monthly data cap. TV programs watched through a Fibe TV receiver don't use the public internet.
2. You can't access recorded programs on your PVR through the app, but you can through an additional Fibe TV receiver (whole home PVR.)
3. Some channels may not be available through the app.