Woot (https://www.mywot.com/) is a browser add on that works to keep you safe. Once installed, if you try to go to a site that is potentially dangerous or just marked as a problem site it pops up a warning that tells you oaf a problem. It will also color code sites based on the trust of the people that have rated it. Green or go, yellow for caution and red for no.
They get these ratings for sites from people like you. Once you start using the program you can contribute by clicking on the icon to tell them of sites you go to and if they are safe or not.
This program won't stop you from going to any sites. You can choose to go there even after the warning. It also isn't perfect. New bad sites are made every day. But it certainly can make your surfing a lot safer.