During the days leading up to the release of Google Chrome, I kept thinking... Oh, No, what's going to happen to Mozilla and Firefox. But after having test driven Chrome for about 2 weeks, I can say for certain that no serious Firefox user will give it up just yet. Google has it's work cut out if it wants to win this war.
With my aging computer, I was barely able to keep 5-6 tabs open using Chrome. With Firefox, I usually have two windows (one for Gmail, Facebook, etc and another one for whatever I am researching) Both windows usually have 6+ tabs open at any given time. Trying to multi-task with Chrome running was a nightmare. Because each tab is a separate process, the browser uses up 100% (or close enough) of my CPU cycles to keep itself alive.