Enigmail failed to install because it is not compatible with Firefox 22

[QAnswer1]

While selecting install from file on Add-on, and selecting the downloaded file - it is showing this error on the tab.

I have uninstalled firefox 23 as same error reported, and tried with 22, same error still.

Thanks,

[Patrick Brunschwig]

Enigmail is a Thunderbird extension, it does not work with Firefox.