Thunderbird 78 introduced several major updates that fundamentally changed how the client works: Download - Thunderbird
Thunderbird Portable 78 remains a popular choice for users who need a stable, standalone email client they can carry on a USB drive. While newer versions are available, the 78 series—specifically the final —is often sought after for its specific features and compatibility with older systems. Where to Download Thunderbird Portable 78 thunderbird portable 78 download
: This site maintains a comprehensive "Version History" section where you can download previous Windows-compatible releases safely. : For advanced users, Mozilla’s own FTP server
: For advanced users, Mozilla’s own FTP server contains every release of the core Thunderbird files, though these require manual configuration to run as "portable". Key Features of the 78 Series You can find specific installers for version 78
Because Thunderbird 78 is an older Extended Support Release (ESR), it is no longer the primary download on the official Thunderbird website. To find the portable edition, you should use trusted third-party repositories:
: This is the official archive for the portable version. You can find specific installers for version 78.14.0 and earlier.