Statistics

The following statistics are only preliminary results of the ongoing study and updated hourly.
Please note that the numbers may change over time, for example, due to data cleansing or change of attributes used for fingerprints.

Study

Measurements

287,015
Number of measurements of browser attributes during study

Participants

4,197
Number of participants with at least one measurement




Year Measurements Active participants
2016 28,370 1,501
2017 51,711 1,256
2018 38,675 921
2019 34,016 789
2020 19,282 597
2021 30,587 1,007
2022 24,973 717
2023 52,820 1,340
2024 6,581 631
Number of collected measurements and active participants grouped by year.

Average

450.7
days

Median

147.9
days

Lower quartile

24.2
days

Upper quartile

483.8
days

Average

68.4
Measurements

Median

14.0
Measurements

Lower quartile

5.0
Measurements

Upper quartile

52.0
Measurements




Fingerprints

Average

20.8
Fingerprints

Median

6.0
Fingerprints

Lower quartile

3.0
Fingerprints

Upper quartile

18.0
Fingerprints

Unique
fingerprints

93.8%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

31.5%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

84.7%
Share of participants that have at least one fingerprint
that is unique amongst all participants

Participants
with trackable fingerprints

66.1%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

44.5
days

Median

21.4
days

Lower quartile

7.8
days

Upper quartile

49.1
days



Avg. stability of trackable fingerprints per participant

Average

56.1
days

Median

32.7
days

Lower quartile

14.0
days

Upper quartile

69.3
days



Max. stability of trackable fingerprints per participant

Average

178.1
days

Median

63.3
days

Lower quartile

16.2
days

Upper quartile

206.1
days

Demographics of participants