A320 - All Components

_fbp

Used by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.

3 months

NID

Registers a unique ID that identifies a returning user's device. The ID is used for targeted ads.

6 months

VISITOR_INFO1_LIVE

Tries to estimate the users' bandwidth on pages with integrated YouTube videos.

179 days

YSC

Registers a unique ID to keep statistics of what videos from YouTube the user has seen.

Session

yt-player-headers-readable

youtube.com

Used to determine the optimal video quality based on the visitor's device and network settings.

Persistent

yt-remote-cast-installed