the launcher

The Launcher issues have been fixed weeks ago though

To improve your experience when playing in Browser, you may;

• Close other opened apps you don't need when playing to allocate more memory to the browser
• Enable Hardware Acceleration in your browser's settings (use google if needed)
• About the sensitivity, you can reduce it by going to the Controls Help menu (at the bottom right of the menu when in-game/in-project)
• Try to use another browser to test if performances are better