When firefox opens it pegs cpu usage to 100% what can I do to fix

?????

You can increase the String pref layout.css.devPixelsPerPx from 1.0 to 2.0 in 0.1 steps to see what works best.
In Firefox 3.6 and later this pref is a String value parsed to a float and allows to fine tune the dimensions of all elements more precisely.
See http://kb.mozillazine.org/about%3Aconfig

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