AdBlock for Google Chrome now stops ads before they download
That's changed, however, thanks to some recent code updates. AdBlock can now act premptively, saving you precious kilobytes (and possibly some additional frustration). As it turns out, it's Apple who is responsible for the change: the beforeload event was actually slipped in during a recent update to the Webkit engine, which eventually made its way into Chrome.
Apart from AdBlock, this should be good news for Chrome users in general as it provides an important content manipulation function.