How to minimize thunderbird to tray?

I know that plenty of answers online, but they are all pretty old. Before to solve this problem used the plug-in minimize to tray. He podderzhivaetsya to version 31.0, I have 52.7.
When trying to install the add-on, it says that my version is not compatible.
So how to solve my problem?
June 5th 19 at 22:07
2 answers
June 5th 19 at 22:09
Solution
MinimizeToTray revived (MinTrayR)
I have now with the latest thunderbird. But there is a downside: the tool opens twice. A duplicate close and until the next reboot is working fine.
Thanks, I'll try too. - Luigi_K commented on June 5th 19 at 22:12
It worked))) - Luigi_K commented on June 5th 19 at 22:15
June 5th 19 at 22:11
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