Helen - 5:02 pm on Jul 7, 2006 (gmt 0)
From what I understand, you can get a version of Firefox that will run from a USB key. I believe that when you log into Adwords, it defaults to https, which is an encrypted session. I'm assuming that any cached info will be stored on the USB key (although don't quote me on that - you'll want to make sure beforehand), which should be more secure. Remember though, there's no such thing as a completely secure system.