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WebNowPlaying-BrowserExtension
Discontinued The extension to go along with the WebNowPlaying plugin for Rainmeter
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
For that, you would need to update the skin to use the webnowplaying plugin and install the appropriate browser extension. Note: that means the skin will work with the online version, but not the app.
Or, you can use spicetify-cli. Now, I don't use it so I don't specifically know how it works (for help with that, check out their sub r/spicetify), but according to their extensions page, it needs a skin that uses webnowplaying, so I guess you'd have to update the skin anyways: