This cookie name is being set on 62,846 websites and 322 distinct domains and we have seen it bein used in the following objects:

  • 62,846 HTTP cookies

Cookie origin and purpose

Cookie classification

  • unknown (confidence 1)

Sample values

Sample value:
f1=50000000
Sample value:
f1=50000000&f5=30
Sample value:
f5=30

Domains targeted by PREF cookie

This list includes both third-party domains set by tracking and adversing companies, as well as the first-party domains of the websites that use this cookie name.

Websites setting PREF cookie

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