[Clug-tech] Firefox performance issues when a firewall is enabled

[Gustin Johnson]

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Here is a weird one.  When I have a firewall enabled on my laptop,
firefox becomes painfully slow (this is when I set the default INPUT
policy to DROP).  When I create a default rule to REJECT all traffic,
performance picks up but is noticeably laggy (eg. there is a few seconds
of delay after I right click a link).  When I completely disable the
firewall Firefox is very fast and responsive.

The hardware is pretty beefy and should not be a problem as it is a 2.5
Ghz dual core Intel Core2, 3 Gigs of RAM, speedy (for a laptop) 7200 RPM
hard drive.

I have disabled every single extension with *no* effect.

Memory and CPU utilization appear normal during these periods of
unresponsiveness as well.

Other web browsers are not effected (konqueror and midori are two I use
regularly as firefox alternatives).

I have also duplicated the problem on two different laptops.

But wait, theres more.  I installed Firefox for Windows, running it in
Wine, and there are no perceptible problems.

Also, this is the 32 bit version of Firefox (downloaded from
mozilla.com) running on a 32 bit install of K/Ubuntu 8.04.

Any ideas?
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