List Highlighter helps you focus on what you're working on right now.
To do lists stay as they are. Doing lists are highlighted. Done lists are faded and greyed out.
Just name your list Todo, Doing, or Done, and styles will be applied automatically. Or name it what you like and tag it with a hashtag (e.g. #todo, #doing, #done). The hashtag will only appear when you're editing the title.
Version 3.2.1 (25 Feb 2018) Compatibility fix for another extension
For more information, see the List Highlighter homepage.