Eaglercraft — 1.8.8 Client [extra Quality]

Since you are likely using a low-end device (think Intel Celeron Chromebook with 4GB of RAM), you need to tweak the settings.

: Multiplayer is enabled via specialized WebSocket proxies, allowing browser clients to connect to standard Java Edition servers or dedicated Eaglercraft-compatible servers. Key Features of the 1.8.8 Client eaglercraft 1.8.8 client

You are the client that refused to die.