Why not to use autocomplete
Today at Pubcon Matt Cutts of Google once again promoted the use of autocomplete-type, a new property for web forms that works in Chrome (and possibly other browsers, I haven’t checked). Google first introduced it back in January 2012 in this post. I wanted to do this quick post to tell you to turn off autocomplete in your browser.
This test URL will show you why quicker than I can explain it in words. Please try it and come back. If you’re using autocomplete to, for instance, sign up for an email newsletter, you might have just provided that website with your full address and/or (even worse) your credit card details too. It’s as simple as adding the fields to the form and hiding them from the user…
So: turn off autocomplete until your browser has better controls on what gets autofilled.
How to turn off autocomplete in Chrome
In Chrome, go to your Settings, click Advanced, then make sure the top box here (that is checked in the screenshot) is NOT checked: