Firefox vulnerability exposes Tor users' private identities across sessions

Researchers at Fingerprint discovered that Firefox's IndexedDB implementation leaks a stable identifier across Tor Browser sessions, potentially linking supposedly anonymous identities. The flaw undermines Tor's privacy model and affects users who rely on browser isolation for anonymity. This matters to indie makers building privacy-focused tools or relying on Tor—it's a reminder that browser-level vulnerabilities can nullify application-level privacy work.