Release v3.9.3

🚀 What's New in v3.9.3

(Note: v3.9.2 was a silent hotfix dedicated to resolving shortcut and locale issues specifically for the Microsoft Store release. All those fixes are included here.)

This release focuses on battle-tested reliability for massive transfers, smoother folder handling, and better edge-case compatibility.

⚡ Battle-Tested Reliability

• Unbreakable Relay Fallback (The 7GB Fix): We identified and fixed a critical edge case during a 7GB real-world transfer from Russia. When a direct WebRTC connection drops and ffl automatically falls back to Relay mode to resume, the browser's TransformStream could become unstable and drop the connection after 300 seconds. We've patched this browser-level instability and tightened overall connection resilience.
• Sidecar Upload Accuracy: Fixed an issue where Sidecar uploads could fail due to the system overestimating or underestimating the final upload payload size.

☁️ Smarter Server Uploads & Folder Handling

• Upfront Points Confirmation: When using the Server Upload mode (--upload), ffl now calculates the total cost and asks for confirmation before starting the upload.
  • Previously, exact folder sizes were unknown until processing, preventing accurate upfront point calculations. This is now fixed.
  • Auto-Accept: You can now pass the --yes (or -y) flag to automatically accept the point deduction and bypass the prompt, which is perfect for headless scripts.
• Real-time Folder Scanning: When sharing massive folders, ffl now displays a live progress indicator while calculating the total size, so you always know the CLI is actively working and hasn't frozen.

🐛 AI Workflows & Edge Cases Fixes

• Claude Code Windows Fix (The nul bug): Fixed a crash that occurred when trying to share a folder containing a file literally named nul. This specific ghost file is often generated by AI agents like Claude Code on Windows, and ffl can now handle (and gracefully ignore) it without breaking the folder share.

---

📦 Which file should I download?

• If you want a single file that runs everywhere, across OSes? choose APE (ffl.com / fflo.com).
• If you want platform-optimized size/perf, choose a native build. 🙂
• On Linux and unsure about glibc (or on musl)? -> APE ffl.com is the safest choice.

ℹ️ On the first run of a native build, the app performs an internal extraction step (by pyapp), so startup is temporarily slower once.
The install scripts pre-warm this step; manual downloads will see the one-time delay.
APE builds (ffl.com / fflo.com) are single-file and do not have this first-run warmup.

---

Windows (native)

• x86_64 → ffl-v3.9.3-x86_64-windows.zip
  Unzip to get ffl.exe.

Linux (native)

We publish two glibc baselines. Pick the highest baseline that does not exceed your system glibc:

• glibc 2.39+ — smaller & faster

  • ffl-v3.9.3-manylinux_glibc2.39-x86_64-linux.tar.gz
  • Best for newer distros (e.g., Ubuntu 24).

• glibc 2.28+ — widest compatibility

  • ffl-v3.9.3-manylinux_glibc2.28-x86_64-linux.tar.gz
  • Works on older distros (e.g., Ubuntu 20); larger due to additional internal linking.

⚠️ If your system is musl-based (e.g., Alpine) or you’re unsure about glibc, prefer APE ffl.com.

macOS (native)

• Apple Silicon (arm64) → ffl-v3.9.3-aarch-darwin.tar.gz
• Intel (x86_64) → ffl-v3.9.3-x86_64-darwin.tar.gz

The archive unpacks to a single ffl binary.

🧰 APE (cross-platform single file, zero external deps)

• ffl.com — Single-file build that runs natively on Linux, macOS, Windows, FreeBSD, OpenBSD 7.3, NetBSD, BIOS, and Android (Termux).
• fflo.com — Alternative APE build that is exactly aligned with the open-source repo (no additional/proprietary addons).
  As a result, features that require closed-source components—such as upload to server (e.g., --upload)—are not available.

For a deeper comparison between native and APE, see the README’s notes.