Opera, Tor Browser, and Vivaldi are options for browsing the dark web on Android. Opera offers a dark theme, media player, and workspaces. While it claims to offer a free VPN, it does collect user data. Tor Browser allows anonymous browsing and protects privacy by isolating pages and automatically cleaning cookies. It can be used to access dark web sites like Facebook through onion services safely. Vivaldi is optimized for tablets and offers configurable tabs, built-in ad blocking, and speed dials. It follows the system theme but can be set to dark mode in settings.