I was under the impression that it was built-in to firefox because i went to a site once and a giant red sign with an X in the middle showed up and told me this site could be very dangerous to my computer and it didnt load the page till i said yes or no. I guess the add-on <if any> probably just has more sites added to it and little more security. Last time i checked FF site it says they are working on there addons section. |