• Wide collection of addons, including ad blockers. • Improved tracking protection. • Private mode available in a single tap. • Customizable start screen layout and navigation bar position (top or bottom). • Dark theme. • Collections of tabs. • Synchronization of tabs, bookmarks, passwords, etc. across multiple devices via Firefox Sync. • Picture-in-picture mode. Fennec F-Droid browser is based on the latest Mozilla Firefox release. It has proprietary bits and telemetry removed, but still connects to various Mozilla services that can track users.