On Ubuntu, Chrome and FF updates are pushed through the repos and are updated through apt-get / Update Manager. It's not annoying at all, and works like clockwork. Kudos to Chrome, FF and Ubuntu!

On Windows, Chrome does a good job auto update in the background. Firefox am not so sure but they too are working on some kind of auto update. Good for them, not being stubborn, and implementing a good feature that their rival has.

Good for Chrome that they aren't suing others trying to implement auto update. :-)