Fingerprint Central gives you two options to combine the custom tags you want to study.
OR (Default option)
With the 'OR' method, you will get fingerprints that satisfy at least one of the chosen tags. Example: if you select 'Firefox' and 'Chrome' with the 'OR' method, you will get all fingerprints from Firefox and Chrome browsers.
With the 'AND' method, you will only get fingerprints that satisfy all the tags.
It is mostly recommended to study a combination of a specific browser with a specific operating system. Example: if you select 'Firefox' and 'Chrome' with the 'AND' method,
the results of your search will be empty since no fingerprints can satisfy being from both Firefox and Chrome at the same time.