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• 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 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.