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chromium-web-store
Allows adding extensions from chrome web store on ungoogled-chromium. Also adds semi-automatic extension updating.
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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.
as an alternative to the already mentioned options there is also ungoogled-chromium on flathub. Flatpak should already be preinstalled on Fedora (was there for me on 36 fresh install). Note that you will need to sideload chromium-web-store to get access to the Chrome extensions store. There is also a workaround for dark mode in the readme on the github repo for the flatpak.