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由 Marcel Oosterbeek 发表于 Sept. 20, 2020 ·

I'm very sorry to see that this great add-on is no longer available due to an update of Thunderbird.
I've used it with pleasure for a long time.

作者 DW-dev (开发者) 日期 Sept. 20, 2020 ·

As announced on the Calendar Tweaks home page some time ago, there will be no more development or updates for Calendar Tweaks.