Reading available memory from web player

Is there any way to read the system's available memory from a web player application?

Some PCs that run the application may have low memory due to running many other applications in parralel, causing the game to crush or behave differently,

i would like to know the available memory when starting the game, if there is not enough i would display a message to the user and ask him/her to restart the system or close opened application and refresh the browser