Fjord Launcher

Fjord Launcher is a fork of Prism Launcher. It was based on PollyMC, which is now unmaintained. It is not endorsed by or affiliated with Prism Launcher or PollyMC.

Advantages of this fork over Prism Launcher

• Support for alternative auth servers

• Ability to download FTB modpacks from within the launcher

Having a problem with the launcher?

You will not open an issue in the Prism Launcher repo.

You will not ask about Fjord Launcher in the Prism Launcher discord.

You will ask in #fjord-launcher in our Matrix space.

You will open an issue here.

Installation

Windows

Scoop (recommended)

scoop bucket add unmojang https://github.com/unmojang/scoop-unmojang
scoop install unmojang/fjordlauncher

Windows (Manual)

You can get installers or portable builds from the releases section, MSVC builds are recommended over MinGW builds, but there's no real difference.

macOS

Homebrew (recommended)

brew tap unmojang/homebrew-unmojang
brew install --cask fjordlauncher

macOS (Manual)

There are builds for macOS in the releases section.

Flatpak

flatpak remote-add --user --if-not-exists unmojang https://unmojang.github.io/unmojang-flatpak/index.flatpakrepo
flatpak install org.unmojang.FjordLauncher

Arch Linux

Fjord Launcher is available from the AUR:

paru -S fjordlauncher
paru -S fjordlauncher-git # build latest Git commit from source

fjordlauncher is available in Chaotic-AUR.

The fjordlauncher-bin AUR package is broken; see unmojang#20.

Debian/Ubuntu

Install from the MPR with Mist:

mist install fjordlauncher
mist install fjordlauncher-bin # binary package
mist install fjordlauncher-git # build latest Git commit from source

Nix

This repository contains a Nix flake:

nix run github:unmojang/FjordLauncher

See nix/README.md for details.

Gentoo

Install from the unmojang overlay:

eselect repository add unmojang-overlay git https://github.com/unmojang/unmojang-overlay
emerge --sync unmojang-overlay
emerge -av games-action/fjordlauncher

Other Linux

AppImages are available in the releases section.

Building

To build the launcher yourself, follow the instructions on the Prism Launcher website but clone this repo instead.

Notes

• You can easily use a custom version of authlib-injector on an instance. Select the instance in the main window, click "Edit" (or Ctrl+I/Command+I), go to the Version tab, click "Add Agents", and select your authlib-injector JAR. If your JAR is not correctly identified as authlib-injector, make sure the Agent-Class field in the JAR's MANIFEST.MF is moe.yushi.authlibinjector.Premain.

About authlib-injector login

For now, you can use username and password to login you account, which can specify which profile to use.Or you can also use email and password to login, but if the server doesn't send 'selectedProfile' in the response, the launcher will use the first available profile.