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After installing the extension, open the Chrome Devtools on any webpage. This extension adds a new tab called "Snippets", where you can view, edit, and run your JavaScript code snippets.
Unfortunately, Chrome doesn't allow extensions to access the built-in snippets, nor does it sync those on its own. So I created my own snippet editor!
The interface uses React and Material UI. The code editor is react-ace. Redux and webext-redux are used to sync all panels.
See the Github Project for planned features. Open an issue if you'd like to suggest a feature.
Freestyle Script. Maybe you don't find that too interesting, but I'll forget it if I don't write it down somewhere...