Why does Firefox 8 maximize to both monitors and ignore dual monitor software rules?

I updated to Firefox 8.0. I have a Colorgraphic 2 (dual monitor) setup. When I maximize FF 8.0, it maximizes to both monitors. My other programs and previous versions of FF do not do this. My multi-screen software is set so maximizing only takes place in the monitor where the curser is, not both. it's also supposed to open in the monitor where the curser is, but doesn't because I can't close maximized because it's covering both monitors. It's like FF 8.0 ignores the multi-screen software rules. Some minor programs (printer, player programs, pop-ups) do this but no major ones until FF 8.0. Can this be fixed?

Jumping from Firefox 2 to Firefox 8 was a very big jump, you skipped 7 versions, and your Profile may be partially b0rked. Try a new Profile and see how it works.
http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows

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