It's significantly more difficult to share resources between processes than it is between threads. There are certainly things you can do, but it requires much

It's significantly more difficult to share resources between processes than it is between threads. There are certainly things you can do, but it requires much more effort (especially if you're trying to be portable), and the results typically aren't anywhere near as good. The effect of this is pretty obvious with chrome vs. FF: chrome memory usage grows a lot faster with multiple tabs than FF's memory usage does. OTOH, it's easier to manually control usage in chrome by killing tabs. Which of these effects is more important depends on your needs (so I tend to switch between chrome and FF...). Anyway, anybody claiming that chrome is "obviously" better than FF these days is on crack. They are both very good, and each has its strong points and weak points, but they're pretty much on par...