Enhanced the compose_attachments context menu and stabilized background startup events for developers.
While newer versions like Thunderbird 115 and 128 are now available, you can still download this specific legacy version from official archives if you require it for compatibility with older systems or specific legacy add-ons: thunderbird 78.5.1 download
Released on December 2, 2020, this version was a "bug fix and security release" aimed at stabilizing the major changes introduced in the 78 series. Thunderbird 78
Addressed a "High" severity vulnerability (CVE-2020-26970) related to stack corruption when reading SMTP server status codes. thunderbird 78.5.1 download
Thunderbird 78.5.1 is an essential maintenance release in the Thunderbird 78 series, specifically designed to address critical security vulnerabilities and improve the built-in OpenPGP encryption system.
The safest way to download this version is through the Mozilla Release Archive .
