None of the existing new tab extensions did what I wanted, so I made one that did. It has an intuitive user interface to create, move, and resize widgets on a grid.
There are already quite a few types of widgets, including: RSS and Atom feeds, the Weather, Quick Links, Top Sites, Daily Goals, Greetings, Notes, your current Age, Search, Web Comics, and upcoming Space Flights.
@rubenwardy I've used Momentum for years (was even a paying customer at one point) and I've just switched to this in a heartbeat 👏
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