Good news! You can f inally open the 400 tabs in Firefox like you always wanted! Starting yesterday 64-bit builds of Firefox are available for Windows. A little while back Mozilla had started producing 64-bit builds for Mac OSX as well. 64-bit builds of Firefox for Linux have been available for quite a while now, and if you are running a 64-bit version of any Linux distro in all likelihood you are already running a 64-bit build of Firefox.
Yup, tried it.
It id not faster than the 32-bit one, at least in sunspider.
They got nearly the same score, with the 64-bit one behind by a few milliseconds.
So right now, not worth it unless you want to open hundreds of tabs which take more than 3GB of memory.
Which will be difficult since no plugins will be running
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