Html5, eaten lots of memory

in html5 target, is there any advice to follow to keep memory consumption down?

I’ve noticed that my project after dragging the sprite many times on stage, memory would get 960MB and higher ! how would I investigate which instances got into memory?

Every unique BitmapData requires additional memory. Does each Sprite use it’s own unique, or are there unique BitmapData instances being used?

There are BitmapData instances being used, I use dispose, is there a tool to do memory profiling?

Just the browser debugger