Onyx Launcher releases https://lonestill.github.io/ Release news for the open-source desktop Minecraft launcher for Windows and Linux. en Onyx Launcher 1.6.3: isolated instances, Modrinth, managed Java, and diagnostics https://lonestill.github.io/blog/onyx-launcher-1-6-3/ https://lonestill.github.io/blog/onyx-launcher-1-6-3/ Thu, 30 Jul 2026 00:00:00 GMT Onyx Launcher 1.6.3 is available for Windows and Linux with isolated Minecraft instances, integrated Modrinth discovery, managed Eclipse Temurin runtimes, crash diagnostics, Crash Bisect, and portable backups.