That search.shroomcourt.com is a browser hijacker, malware that you will want to get rid of. Go to the Firefox menu (≡) => Add-ons => Extensions ( Mac : Command + Shift + A) and look for '''any other unfamiliar or suspicious looking extensions'''. When you find any : remove them. Do the same here : for Windows => Control Panel for Mac and Linux => System Preferences 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 : https://malwaretips.com/blogs/remove-search-shroomcourt-com/ http://www.free-uninstall.org/how-to-uninstall-remove-search-shroomcourt-com-mac/ Especially for Mac : https://www.malwarebytes.com/mac/ And : https://malwaretips.com/blogs/remove-mac-os-x-virus/

See also: *https://www.google.com/search?num=100&q=search.shroomcourt%20remove