Debian Linux Security Advisory 4062-1 - It discovered that the Private Browsing mode in the Mozilla Firefox web browser allowed to fingerprint a user across multiple sessions via IndexedDB.
79e6fa33d72f31becbc7e2b10a9a236b19e8b03007426e94a8f3eb202b023bb9
Red Hat Security Advisory 2017-3382-01 - Mozilla Firefox is an open source web browser. This update upgrades Firefox to version 52.5.1 ESR. Security Fix: A privacy flaw was discovered in Firefox. In Private Browsing mode, a web worker could write persistent data to IndexedDB, which was not cleared when exiting and would persist across multiple sessions. A malicious website could exploit the flaw to bypass private-browsing protections and uniquely fingerprint visitors.
2324e95575ad13c5583017748ce56a49920dd2b8c7fd3bc8aea8d907e070afdc