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I use Thunderbird 60.7.1 (debian 9) and add-on MinimizeToTray-reanimated. The problem is every time when I start Thunderbird I have the following message. I mark allow this installation
after which I have to restart Thunderbird. After restarting everything is ok and MinimizeToTray is working. However, when I start Thunderbird next time I see the message again. How to fix it?