Press the buttons simultaneously to take a screenshot. Open your phone’s Gallery app to crop out the background. Finding Pictures via Android File Manager (Advanced)
Your best bet is if you are tech-savvy, or simply ask the person for the photo. Avoid shady "downloaders" that promise the world but deliver malware. Respect privacy, use images ethically, and remember that a profile picture is just a thumbnail—the real connection is in the conversation. viber profile picture download