A:AnswerGo Home > Settings > Network, select Forget Network to disconnect the TV from the Wi-Fi.
You can connect this TV to the internet using an Ethernet cable.
David M. - Toshiba Support
A:AnswerThe Roku app is not available for the Fire TV Edition experience.
You can connect your Roku device at any time using an HDMI port.
David M. - Toshiba Support