In the alternate future timelines, Future Frieza and Future King Cold journey to Earth to destroy it in August of Age 764. Before they could even start their assault, Future Goku returns to Earth via Instant Transmission and successfully kills Future Frieza and Future King Cold. It was at this point that King Cold and Frieza had their DNA sampled by Future Dr. Gero's Remote tracking device for the creation of Cell.
Dragon Ball Super
"Future" Trunks Saga
In Cell's timeline, Future Frieza's history was similar to in Future Trunks' timeline, however, Present Frieza was instead killed by Future Trunks, the same way as Future Frieza was.
While Future Frieza does not actually appear in Dragon Ball Z: Resurrection ‘F’, he is mentioned in one of Bulma's blog posts, where Future Trunks mentions that Future Frieza was never resurrected in his timeline.
Mecha Future Frieza
Main article: Cosmic Suit The Future Frieza of Cell's timeline possessed this form. It was stated by Cell that when Future Frieza came to Earth he was "mostly mechanical at the time".