Have you seen you can pull off a tab and create its own window? Then you can put it back. Plus sites like gmail can be made into there own app you can launch separately.
Chrome's much more intuitive than FF. It uses a different thread for each page you have up. This way, if one of your pages craps out, you can just kill that tab, not the entire browser.
Every next generation browser, btw, will have super fast javascript and rendering engines. FF 3.1 comes out soon as well.
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