[ygra]

If there was something like »Updates for your extensions are available, install them now?« would it really help or would most users just say »yes«? They'd have no way of verifying that the update is benign or not anyway.

[wfunction]

It should be more like "Updates for your extensions are available; they will be installed when Chrome is restarted. [OK] [Cancel automatic updates]".

Or basically anything that gives you the option to avoid doing so.