Onion Browser is a Tor-based web browser that provides anonymity and privacy while browsing the internet. Onion Browser routes internet traffic through servers, making it difficult to track online activity or identify the user's IP address. While using Onion Browser, the user's IP address is hidden from websites and anyone monitoring internet activity. However, Tor has potential vulnerabilities that could compromise anonymity and privacy. Onion Browser offers anonymity and privacy but does not guarantee complete security or protection from all online threats. Practicing safe browsing habits and additional measures to protect privacy and security online is recommended.