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Cant install Thunderbird add on, OS X 10.9.4


The plugin download is in a format that can't be uncompressed on OSX: extension is .xpi

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David Trey  staff
Replied on Jul 15, 2014 - 13:01 UTC

Hello Ed,

The XPI file should not be uncompressed. When you open Thunderbird and go to the add-ons section, you should have a choice to "Install add-on from file..." and then select the XPI file which Thunderbird will convert to an add-on.

Best regards,