Most people don't even know Chrome is updated because it is a silent update, also add ons normally work from one version to another, something Firefox seems to have problems with.
i don't use Chrome myself, I use Iron, so I got to download the updates and install them myself. I think I am still using 2 versions below what is available.
I liked firefox, it is not the updates that is the problem for me, it is the fact that it don't improve, in fact Firefox seems to get worse with each so called update.
I may try 9 beta and see if that is any better, but no doubt it will take a age to start up