Maybe try a virtual power-stabilizer/battery-backup to protect from voltage spikes like this ;)
I disabled hardware acceleration due to some DRM reasons and notice heavy JS graphics will lag the browser.
same here in safari. first strike ok, second froze for a few sec. I did like the sort of 'obstruction' effect of the rain on the house for example. obvioulsy a limitation of the char based render, but it adds a pleasing kind of obscuring effect.