In the "Lite" version, your settings might reset every time you close the browser. The version saves your hotkeys and mod configurations locally via localStorage or cookies.
Add a multiplayer server (e.g., eaglercraft.org or any 1.8.8-compatible server) and play. shadow client eaglercraft full
Draws direct lines from your crosshair to nearby players, making it impossible for enemies to sneak up on you. In the "Lite" version, your settings might reset