I'm on OS X 10.5 running FF 3
- spigoat on June 23, 2009, 11:36 PM UTC
The reference probably mentions this, but do you have Firebug running? It can really kill performance. You should disable it by default for all sites and turn it on piecemeal.
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http://kb.mozillazine.org/Problematic_extensions - found by k7lim on June 05, 2009, 11:16 AM UTC
This is a list of extensions that can slow down or cause problems in firefox