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Latest Thunderbird update breaks multiple plugins

Hi list members,

with the latest Thunderbird update (60.2.1) some plugins are broken. E.g. Color Folders (last change July 2014), FireTray (last change May 2016, discontinued), Lightning (last change May 2017).
Does some of you have a clue, if one should just forget about those plugins or what to do?
Any, yes I know, there may be Bugzilla.