Threejs crash on mobile browser

When I run on iOS or android with 2GB RAM ,browser crash after loading 2-3 models . I figured out memory issue for which I applied Dispose function for each of geometry as well as material but the issue is still there.
Please suggest any tool to figure out where is the memory leakage.

I would suggest using the Chrome or Firefox dev tools. There are lots of tutorials online which can show you how you would check for memory leakage with these.