What is what does ff mean?

FF can stand for several things depending on the context:

1. Firefox - A popular web browser developed by Mozilla Corporation.

2. Fan Fiction - A type of fan-written fiction featuring characters or settings from an existing work of fiction.

3. Follow Friday - A social media trend, mainly on Twitter, where users recommend people to follow every Friday.

4. Final Fantasy - A popular video game series developed by Square Enix.

5. Fast Forward - An option used to skip ahead through audio or video content.

6. Foundation Fieldbus - A digital industrial communications system used in automation technology.