Assuming you have downloaded a legitimate file, here is how to get a world loaded in under 60 seconds.

Because it runs in a browser sandbox, you will encounter unique bugs. Here is the fix for the top three complaints:

So, why choose Eaglercraft 1.9 Launcher over other Minecraft launchers? Here are some advantages:

Leo stood on the edge. He knew this version of the game—this "Eagler" build—was fragile. It was running on borrowed time, a sandbox emulation of a world that existed only in memory and JavaScript. If he jumped, would the game crash? Would the universe fold in on itself?

: Reduce "Render Distance" to 1 or 2 for significant FPS boosts on low-end hardware.