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privacy-redirect
A simple web extension that redirects Twitter, YouTube, Instagram & Google Maps requests to privacy friendly alternatives.
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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.
Here's the link to the author's homepage where you can find addons for your browser.
https://github.com/SimonBrazell/privacy-redirect/ [available for firefox, chrome]
YSK: Blokada, uBlock Origin
NewPipe: https://newpipe.net/ [app for android]
FreeTube: https://freetubeapp.io/ [app for windows, mac and linux]
YSK: Blokada, uBlock Origin