  The research community has deemed cookie synchronization detection an
inherently challenging task. Studies aiming to identify cookie synchronizations
often share high-level design choices, but deviate amongst low-level
implementations. For example, the majority of studies label a cookie
synchronization iff a user identifier is shared with a third party; however,
there is a lack of consistency among implementations, such as party relations
or identifier value definitions, or whether such definitions are even included.
This review intends to provide a record of established methods and promote
standardization of methods choice in future work.
