How to setup lightweight linux+chrome+virtualbox?

So, basically all I need is chrome running with one of it's plugin in a virtualbox on my computer.

I need the linux to be really light on RAM and CPU as I need many of these set ups running at the same time.

I tried with tinycore but they have only chromium with witch my plugin doesn't work.

Any advice? Have been trying the whole day with no results :(

Thanks!