A web browser does not simply just download and serve html anymore. Browsers have many features additional features that can be detected such as which version of flash your running, java and all add-ons you have installed which is can act as a very good fingerprint that be used to track people.
From the data collected 1 in 286,777 browers are unique, so from a legal point it would not stand in court.
You can test your brower uniqueness below
The electronic froniter foundation has an excellant paper on browser uniqueness
Foremost is a Linux fornensics tool but can be run under windows using cygwin.
First install Cygwin , Install to the default location.
Then download a cygwin compiled version of foremost from a mirror here
Extract foremost.exe and it’s config file to C:\cygwin\home\~your pc username
Then go to C:\cygwin and run Cygwin.bat#
Then you can run formost via the cygwin CLI
./foremost.exe -t all -i somecase.dd -T
Sources used : http://www.dcheeseman.com/blog/post/foremost-windows
This is a digital forensics report I did for digital forensics module it covers crime scene investigation and imaging of evidence.
It uses ACPO guidelines so all evidence is submissible to court.