Download Enigmail What email client do you use? --- What operating system do you use? Windows Linux (32-bit) Linux (x86-64) Mac OS X FreeBSD NetBSD OpenBSD Solaris OS/2 Other (source code) Download Now Version xyz Download signature file View Changelog To install Enigmail on Thunderbird, use right click "Save Link as ..." to save the extension locally. Then navigate to the Thunderbird menu Tools > Addons and click on the small Tools button in the upper right corner and then on Install Add-on From File.... something