Browser crash for out of memory

Hi,all We recently develop a web game which contains a lot of scenes. At first we build the client with all the scenes needed. Thinking of the downloading time, we split them, building some of the scenes and put the others on the server. Users will only download them when necessary. It does decrease the size of client program, but it cause a memory problem. When downloading the scenes on the server, it needs more memory. Before I finish downloading all of them, the memory footprint is more than 1.6G, which will cause the browser to crash.When we build all scenes together,the memory footprint is about 1.25G. How can I decrease the memory footprint to prevent the browser to crash.