The primary focus of Paris web developers regarding web user data security is to protect, detect, and eliminate cyber threats. They achieve this by integrating robust security practices in the website development, such as 2-factor authentication, access permission control, HTTPS encryption, secure API installation, server-side validations, in-depth debugging, regularly updating the security patches, securing cookies sessions, and many more. Using these practices and several security plugins and tools, Paris web developers maintain high data integrity in the developed websites to ensure smooth functioning and confidentiality.