Allow browser to use more cores

I wrote an algorithm with JavaScript. When I execute it in Google Chrome, it takes about 30min, which is quite long.
When I open the task manager during the computation, I can see that Chrome takes about 25% of my CPU, so 1 of my 4 cores.

Is it possible, to allow Chrome to use more of my CPUs, say 3 of 4, so that the computation will be executed faster?

PS: I don't mind using any other browser (e.g. Firefox) if Chrome won't support that.