Firefox slows down pc......

[Kaspars]

  Hi,

  I search and don`t see that there is topic about my problem yet and 
don`t know is this here...
  I`m using fresh FC3 reinstalled for week and updated, problem is that 
something like to eat my pc power and I found that it is firefox... New 
firefox when opened couple tabs (last 5) and all try to download some 
site was fulling my memory/processor, top of the "top":
19.0 10.1   2:10.66 firefox-bin
10.2 50.3  11:52.26 X
and load start to fullfill: load average: 5.31, 3.43, 1.98

Last time load was go so high that something kill some process and pc 
freeze. Only reboot help...
So I`m thinking what to do, I have all updated etc. Start to think to 
compile maybe by my self ff. Don`t know what to do...
Pc is year old Toshiba Satellite with p4 and 256ram.


Casper