TurboTax.com (Here we go again...)

[Bruno Wolff III]

On Thu, Jan 29, 2009 at 06:58:56 -0700,
  "Christopher A. Williams" <chriswfedora at cawllc.com> wrote:
> On Wed, 2009-01-28 at 11:19 -0600, Matt Domsch wrote:
> > 
> > is a User Agent string on an XP system with FireFox 3.0.5.  You can
> > simply add this to User Agent Switcher.
> 
> Thanks! This is exactly what I was looking for.

You can also just set general.useragent.override in about:config and
set the alternate useragent header without installing a plugin.

If you set it to the empty string the header isn't even sent.