2nd + tabs in Firefox go slow...?

Question

ok so

i have had firefox 3 for a few months now

and just this past week

whenever i use a 2nd tab, it goes slow, the first tab goes fast but the second, 3rd, 4rth... ones go slow...

does anyone know how i can fix this or why its happening?

i even re-installed firefox today and its the same

Answer 1

try disabling add-ons, go to Tools>Add-ons

Answer 2

try increasing your diskspace and RAM. If that doesn't help, you may have spyware/malware or a virus.