- Added a third “4via6” DNS option with punycode display, plus new CLI commands `tailscale set` for config tweaks and `tailscale lock` for tailnet locking.
- Implemented Fast User Switching on Linux, Windows, and macOS (UI and CLI), introduced Windows named‑pipe UI‑service communication, Taildrop file handling changes, and Synology/Container improvements.
- Extended platform support with FreeBSD, Tailscale SSH, Android Sonos LAN discovery, and reduced iOS app size; includes various minor UI and backend refinements.