Safe Browsing by Safely is a search hijacker. The Firefox add-on was downloaded from their website. Malwarebytes can detect and remove this potentially unwanted program. It would have blocked their website, giving you a chance to stop it before it became too late. You may see these browser extensions and warnings during install:. You may also see these changed settings:. The full version of Malwarebyte Browser Guard would have protected you against the hijacker:. We hope our application and this guide have helped.”]
Source: https://forums.malwarebytes.com/topic/254947-removal-instructions-for-safe-browsing-by-safely/