Bye bye Firefox? :'(
No I don't think that will be the case, this is very early days and some of the stuff mentioned is already available in FF 3.0.1 and IE8 even.
No doubt it will put the cat amongst the pigeons, whilst add-ons are mentioned there will be no way it would have the same add-on support as firefox, which has thousands. Unless there is going to be some way they can port them to Chrome with the add-on authors consent

As one of the articles mentions it is more likely to hit the likes of Opera and Safari for windows and it could be a joint effort firefox/chrome to squeeze IE's market share. Or that in the future perhaps firefox and chrome could merge.
So it is still very early days and much to speculate about, but certainly nothing to worry about.