They took it down because it didn't have microtransactions aimed at children, and doesnt require you to purchase Microsoft subscriptions to play on servers. Only Microsoft gets the opportunity to exploit kids.<p>Eaglercraft from what I understand was a very old version of Minecraft no one plays. "Mojang" (actually Microsoft don't be fooled), is not in any way threatened by these. The time they've spent paying lawyers is more loss than what these would do.
What was the tech stack? Did they actually port Minecraft to web assembly or js, or did they use a JVM that was ported to the browser? I guess a Java applet is out of question. ;-)
Minecraft already runs in a browser.<p><a href="https://classic.minecraft.net/" rel="nofollow">https://classic.minecraft.net/</a>