Hi, Netfind.com is a browser hijacker, malware that you will want to get rid of. Go to the 3-bar menu (or 'Tools') => Addons => Extensions and look for '''any unfamiliar or suspicious looking extensions'''. When you find any : remove them. Do the same in your system's Control Panel. However : most malware will be 'hiding' somewhere , so let's run malware scans : Further information can be found in this article : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no Run most or all of the listed malware scanners. They all work differently - what one program doesn't pick up, the other might. Also see : http://www.besttechtips.org/how-to-remove-netfind-com/ and also : http://www.2-remove-virus.com/remove-netfind-com/ Especially for Mac : https://www.malwarebytes.com/mac/