Frequently asked questions

Yes. FluxDown is an open-source project — the app is free to use, with no ads and no hidden fees.

FluxDown uses multi-threaded downloading with intelligent segmentation. It splits files into multiple parts and downloads them simultaneously, similar to how IDM works. The Rust-powered engine ensures maximum throughput with minimal resource usage.

FluxDown offers similar multi-threaded download acceleration but is completely free and built with modern technology: a Rust download engine and a native, GPU-rendered desktop UI built with GPUI. It supports HTTP, HTTPS, FTP, BitTorrent, and HLS/DASH streaming, and features smart segmentation based on your system specs.

Windows (10 or later, x64/ARM64), macOS (Apple Silicon & Intel), and Linux (x64) are fully supported. Windows 7/8/8.1 are not supported. On macOS, you may encounter a 'damaged app' warning — see our macOS Gatekeeper guide for a quick fix.

The browser extension supports Chrome, Edge, and other Chromium-based browsers. Firefox support is also available. The extension automatically intercepts downloads and sends them to FluxDown for accelerated downloading.

The easiest way is to install directly from the Chrome Web Store or Firefox Add-ons Store — just search 'FluxDown' and click install. Alternatively, you can download the offline extension zip from our Download page, extract it, open chrome://extensions, enable Developer Mode, and click 'Load unpacked' to select the extracted folder.

This happens because FluxDown is not yet signed with an Apple developer certificate. It does not mean the app is actually damaged. You can fix it in most cases by running a single Terminal command. Visit our macOS Gatekeeper guide at /macos-gatekeeper for step-by-step instructions.

Absolutely. FluxDown is built with Rust, which guarantees memory safety. The browser extension communicates with the app via Native Messaging Host (NMH) — a secure, browser-native protocol that uses local IPC (Named Pipe on Windows, Unix socket on macOS/Linux). No data is ever sent to external servers. All your download data stays on your machine.

Yes, FluxDown has full breakpoint resume support. All download progress is persisted to a local SQLite database. You can safely close the app or restart your computer without losing any progress.