The FBI Virus is also referred to as the Greendot virus, Citadel Reventon disguise itself as FBI, and if you want to access your computer in the allotted time of 48-72 hrs then you have to pay the penalty of $100, $200, or more using Moneypak Card.
FBI virus on Mac Locks the Safari Browser and gives you a warning, you cannot close safari to exit it.
2. From the drop-down menu click on Reset Safari.
3. Select all the checkboxes and click on Reset.