A:Answer If you mean, can you stream from the internet by logging in to your own network router, then "yes."
But if you are asking whether you can browse the internet, the answer is "Not directly since Roku does not have a built in browser app."
But you can use your mobile phone to cast/mirror to the Roku, and thus see on the TV what you are seeing/browsing on your phone. Alternatively, you can also stream/mirror a computer using wifi, or you can hook a desktop or laptop to the TV using an HDMI cable and use the computer to browse while displaying it on your TV.