Hi, this will give you all the info you need to get rid of the malware : https://www.malwarebytes.com/mac/ Please use more than 1 scanner as each uses diff tech : *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Save your Report and google each before deleting anything as do not want to delete something you need, If need help : *https://forums.malwarebytes.com/topic/9573-im-infected-what-do-i-do-now/ Uninstall any Bittorrent apps, uninstall cracked programs and delete cracks then Post in only 1 forum, then wait. Please let us know if this solved your issue or if need further assistance.