This is a generic solution for launching Java JAR files from file managers (Nemo, Nautilus, etc.) on Linux desktop environments. On many Linux systems, double-clicking a JAR file from a file manager ...

I’m trying to install OptiFine for Minecraft 1.21.9 (preview_OptiFine_1.21.9_HD_U_J7_pre2.jar). When I double-click the .jar file, I get the blue loading circle ...