There used to be a site that let you (voluntarily) do this. Can't find it now, and wouldn't be surprised if it shut down. Anyway, it made the average computer

There used to be a site that let you (voluntarily) do this. Can't find it now, and wouldn't be surprised if it shut down. Anyway, it made the average computer sound like a jet engine. That, and the fact that the average computer is nearly useless compared to a dedicated mining rig, makes browser-based mining probably not worth it.