Google’s Safe Browsing API was designed to spot malicious web pages so users wouldn’t get trapped in them. Chrome’s protection rate rose to more than 50 percent before falling back down to 20 percent. Mozilla and Mobile Firefox developer Gian-Carlo Pascutto initially wrote that Firefox does not have permission to use the download protection list. Google strongly denies it’s holding back anything from the API. Mozilla’s director of Firefox engineering: “We are still evaluating the merits of that approach””]