The only downside of this add-on is that the people who typically install it already know most of the sites that this add-on warns them not to visit. Still, I'd really like to promote this add-on. Four stars out of five, because there's always room for improvement.
it's great for giving you a heads up about a website before you download anything from it... but if you decide you do actually want to continue browsing the website, you'll be reminded every time you load a new page. There needs to be an option to "disable on this site for the next hour" or something. It will be nice if it would prevent the site from loading at all until you confirm you still want to visit, because the page will still load in the background at this point