When might Facebook place cookies on my computer or device?
Facebook may place cookies when you visit us or a partner using a browser or device that permits the placement of cookies. Your browser or device may allow you to block these technologies, but you may not be able to use some features on Facebook if you block them.
Note that your browser or device may or may not include tools that allow you to manage cookies. For more information about whether tools are available and how they work, visit your browser or device's help materials.