thread can not work on Firefox

[aisnote]

my native c++ code may involve the thread like background processing.
And I tried on Firefox, it stuck it.

On Chrome, it is ok.
I built with:
-s PTHREAD_POOL_SIZE=8 -s USE_PTHREADS=1 -s MAIN_MODULE=1 -pthread
And this is from the building:

em++: warning: -sMAIN_MODULE + pthreads is experimental [-Wexperimental]

Any ideas? thanks.

[sbc100]

You can try building with -sPTHREADS_DEBUG

[aisnote]

will try and back to here. Thanks.