What browwser do you like?
same question: what is the church you are going every sunday?
Ok
I'm working as an IT security officer ... in the last time firefox and all of it's childs had a lot of vulnerabilities .. more than IE!
In Firefox you can add a lot of ADDINS .. all secure??
.. and stop the mare about MACs are more secure
.. so stop the war!
For any browser you has to update quickly and on time.
... do not go to all the red light sites and other warez sites,
this gives a lot more security
[ if you have no sex you do not need condoms

]
at last .. use a good virus scanner with the latest pattern!
for more information look at
http://www.us-cert.gov and you will see where the war is.
Cheers
Gerhard