Open your browser's Developer Tools (F12), go to the Console, and look for the Eaglercraft initialization script. Adjusting the target framerate cap or forcing WebGL 2.0 rendering via browser flags ( chrome://flags/#use-angle ) can instantly double your FPS.
Eaglercraft 1.5.2 has a bug in how it handles signed chunks. By sending a malformed packet, you can force the server to crash the chunk you are standing in. Hacks For Eaglercraft 1-5-2
: Maximizes game brightness, making torches unnecessary in caves. Open your browser's Developer Tools (F12), go to