Here are 2 tricks to overcome the issues with bad memory allocation:

• Run the game in private mode. This ensure that, when you close the tab/client, all memory (which are allocated in a closed memory box) gets properly cleared from the system' memory. In the case of a game with a saving feature, you will not be able to save anything though unless the saving feature is connected to a server (which I doubt anyone had time to do it in 10 days). It won't help with issues about GPU though, but will help with issues with CPU and general memory allocation.

•When closing the browser after playing, open the task manage (CTRL + ALT + DEL) and check if it's still opened in the background and look at what is taking all the memory. There could be something that was launched to run element in the WebGL codes that doesn't close properly.

There are other ways,  but that's generally the 2 things anyone can do with ease.