It seems there is some related issue on emscripten side... but I'll keep the icons here despite not displayed properly for the moment.

Very weird... lately icons are not properly displayed on browser!

Found some issues when building for web using latest emscripten 1.38.30, traced the error and found that eglGetProcAdress does not return function pointers for VAO functionality, supported by extension.

It requires more investigation but now it works (avoiding VAO usage)

Support file download to disk from memory filesystem.

..to avoid blending issues with white background