Thunderbird Privacy Notice by Mozilla

Updated 9 December 2025

This Privacy Notice outlines the data collection and sharing practices for the Thunderbird email client across its desktop and mobile versions. It details the types of data collected, such as interaction and technical data, email domains, and crash reports, explaining the purposes behind this collection, including performance improvement, email/calendar setup, and security. The notice also clarifies how OAuth information is handled and the circumstances under which data may be disclosed to third parties.

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