Wife has 57 running on her older model laptop (Win7, 32 bit). Just found her trying to kill firefox because it was too slow; she was dismayed by the proliferation of multiple firefox.exe processes instead of the usual one. (I advised about "kill process tree"; seems to have worked).

Faster, my left foot.

Not in any real sense for the everyday user.

Task manager is still your best friend.

To add insult to injury, the "Restart firefox" extension (your other best friend) is gone.