Browser fingerprinting, which involves collecting information about a user's browser and device to create a unique identifier, can be considered personal data under the General Data Protection Regulation (GDPR). As such, the processing of browser fingerprints would need to comply with the GDPR.
The GDPR requires that the processing of personal data have a legal basis, such as obtaining the user's consent or having a legitimate interest. In the case of browser fingerprinting, obtaining the user's consent would be the most appropriate legal basis.
However, obtaining valid consent for browser fingerprinting may be challenging, as it may not be immediately clear to users what data is being collected, how it will be used, and who it will be shared with. Additionally, users may not be aware of how to revoke their consent or exercise their other rights under the GDPR.
While it is possible to conduct browser fingerprinting in a GDPR compliant manner, organizations should consider the legal basis and provide users with clear information and options for control.