FullscreeNO - No More Fullscreen Mode on Startup
Tired of Minecraft automatically opening in fullscreen mode? This mod solves exactly that problem! Now the game will launch in windowed mode, which is especially convenient for those who frequently switch between applications or work with multiple monitors.
Interestingly, this project was created based on a similar mod for Fabric, but adapted specifically for Forge users. All other fullscreen mode functions remain fully available - you'll still be able to switch between modes in the game settings.