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بواسطة Jim_Dengler في مارس 29, 2018 · رابط دائم

I can only quote Anonymer Nutzer 88e28d from Feb. 11 2018 just updating my versions of Firefox and Thunderbird: "How did you people manage to review this add-on? I can't even get it to install. I am trying to install on a Windows 10 PC with Firefox 59.0.2 and Thunderbird 52.7.0 - should be the latest version of both. All I get is: This add-on could not be installed because it has not been verified"