FLauncher

Spec sheet

What it does

FLauncher is a custom Minecraft launcher for managing multiple installations, accounts and modpacks.Read 15 Oct 2026 · github.com

Purpose

FLauncher is a custom Minecraft launcher for managing multiple installations, accounts, and modpacks.Read 11 Oct 2026 · github.com

Free plan

YesRead 22 Sep 2026 · github.com

License

FLauncher is distributed as free software under GPL-3.0-only.Read 15 Oct 2026 · github.com

Account locking

A bound instance refuses to launch when its designated account is unavailable or invalid.Read 15 Oct 2026 · github.com

Account privacy

Release notes describe per-instance account locking, proxies, language overrides, a Linkability Report, and stream-safe username masking.Read 11 Oct 2026 · github.com

Automatic updates

Installed MSVC builds from version 12.0.2 onward are stated to auto-update.Read 15 Oct 2026 · github.com

Built-in modpack catalog

YesRead 22 Sep 2026 · github.com

CurseForge integration

The launcher can install mods and modpacks from CurseForge.Read 15 Oct 2026 · github.com

Discrete GPU setting

Version 12.2.0 can register the exact javaw.exe used by an instance as a high-performance Windows GPU application.Read 15 Oct 2026 · github.com

Documentation depth

The project directs builders to Prism Launcher's upstream development documentation rather than maintaining a separate FLauncher build manual.Read 15 Oct 2026 · github.com

Downloads

The 12.0.4 release notes give a Windows installer filename and say installed MSVC copies from version 12.0.2 onward auto-update.Read 11 Oct 2026 · github.com

Implementation

The project is written in C++ with Qt 6 and uses CMake.Read 15 Oct 2026 · github.com

Independent distribution listing

Flathub lists the upstream Prism Launcher as a free desktop application with a 40 MiB download and marks support status unknown; this is not an FLauncher listing.Read 15 Oct 2026 · flathub.org

Instance isolation

Each Minecraft instance is kept in its own folder.Read 15 Oct 2026 · github.com

Java runtime management

YesRead 22 Sep 2026 · github.com

Java selection

Users can choose a Java version separately for each instance.Read 15 Oct 2026 · github.com

Language override

An instance can override the Minecraft client locale independently of other instances.Read 15 Oct 2026 · github.com

Limit: old Java

The release notes warn that Java 8 builds older than update 40 may reject the generated garbage-collector flags.Read 15 Oct 2026 · github.com

Limit: proxy routing

In-game server routing still depends on a proxy mod; the launcher hands the proxy information to that mod.Read 15 Oct 2026 · github.com

Limit: wrapper commands

Windows process-priority optimization is not applied when a wrapper command is configured.Read 15 Oct 2026 · github.com

Linkability report

The account-privacy tools scan instances for shared accounts, proxies or unprotected configurations that could connect identities.Read 15 Oct 2026 · github.com

macOS build

The repository gives Homebrew and CMake commands that produce an FLauncher.app bundle.Read 15 Oct 2026 · github.com

Maker identity

The repository is owned by the GitHub account NotFuture1, whose profile display name is future.Read 15 Oct 2026 · github.com

Mod sources

It can install modpacks and mods from Modrinth and CurseForge.Read 11 Oct 2026 · github.com

Modpack import

catalogRead 22 Sep 2026 · github.com

Modrinth integration

The launcher can install mods and modpacks from Modrinth.Read 15 Oct 2026 · github.com

Per-instance proxy

Each instance can use its own SOCKS5 or HTTP proxy, optionally with authentication.Read 15 Oct 2026 · github.com

Performance settings

Version 12.1.0 adds optional JVM flag tuning, automatic memory sizing and Windows game-process priority.Read 15 Oct 2026 · github.com

Proxy behavior

For in-game server connection routing, the release notes say a proxy mod uses the FLAUNCHER_PROXY environment variable; the launcher routes the game's web traffic and hands off the proxy.Read 11 Oct 2026 · github.com

Proxy environment variable

The launcher exposes the configured proxy to mods through FLAUNCHER_PROXY.Read 15 Oct 2026 · github.com

Proxy reachability check

Before launching a proxied instance, FLauncher checks that the proxy works and changes the apparent IP address.Read 15 Oct 2026 · github.com

Recent release

GitHub lists FLauncher 12.2.0, labeled Optimization Suite Phase 2, released on July 7, 2026.Read 15 Oct 2026 · github.com

Repository activity

The FLauncher repository page shows one star, zero forks, zero issues and zero pull requests.Read 15 Oct 2026 · github.com

Security claim

The account-privacy release says safeguards are opt-in and include kill switches, with normal instances unaffected until configured.Read 15 Oct 2026 · github.com

Separate instances

YesRead 22 Sep 2026 · github.com

Stream-safe usernames

A mode can hide account usernames in the interface during streaming or screen sharing.Read 15 Oct 2026 · github.com

Third-party licensing

The repository preserves upstream notices for Prism Launcher, PolyMC and MultiMC and includes third-party license text.Read 15 Oct 2026 · github.com

Upstream

FLauncher is a rebranded and extended fork of Prism Launcher, which itself descends from PolyMC and MultiMC.Read 15 Oct 2026 · github.com

Upstream content management

The Prism base project documents management of worlds, resource packs and shader packs.Read 15 Oct 2026 · prismlauncher.org

Upstream crash handling

The Prism base project documents killing a Minecraft process after a crash or freeze and viewing or uploading logs.Read 15 Oct 2026 · prismlauncher.org

Upstream mod loaders

The Prism base project documents one-click installation for Forge, Fabric, Quilt and LiteLoader.Read 15 Oct 2026 · prismlauncher.org

Upstream supported systems

The linked Prism build guide lists Windows 10 version 1809 or later, macOS 12 or later, and Ubuntu 22.04 or equivalent.Read 15 Oct 2026 · prismlauncher.org

Upstream toolchain

The linked build guide requires a C++17 compiler, JDK up to 17, CMake 3.22 or newer, Ninja and Qt 6.Read 15 Oct 2026 · prismlauncher.org

Windows download

Release 12.0.4 names a Windows installer file, FLauncher-Windows-MSVC-Setup-12.0.4.exe.Read 15 Oct 2026 · github.com

Windows optimization

The release notes describe an optional setting that registers the instance's javaw.exe with Windows as a high-performance GPU app.Read 11 Oct 2026 · github.com

Plans and prices

Every FLauncher plan and price →

Where Specifiction places it

• Minecraft Launchers#21 of 758.4