That search.mapseasy.net is a browser hijacker, malware that you will of course want to get rid of. Go to the Firefox menu (≡) => Add-ons => Extensions, and look for '''any other unfamiliar or suspicious looking extensions'''. When you find any : remove them. Do the same in Windows Control Panel, just to make sure. However : most malware will be 'hiding' somewhere , so let's run malware scans (even though you already have run some) : 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.myantispyware.com/2018/08/07/how-to-remove-search-mapseasy-net-chrome-firefox-ie-edge/