There are so many people that keep asking again and again what browser has better privacy or what these browsers block in specific, just use this link to compare them. It gets updated very frequently.

This page summarizes the projects mentioned and recommended in the original post on /r/browsers
Privacy Firefox Testing Security open-source

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.
surveyjs.io
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InfluxDB - Power Real-Time Data Analytics at Scale
Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
www.influxdata.com
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  • privacytests.org

    Source code for privacytests.org. Includes browser testing code and site rendering.

  • user.js

    Firefox privacy, security and anti-tracking: a comprehensive user.js template for configuration and hardening

    • I would highly suggest LibreWolf just like op but if you want you can use Arkenfox's user.js https://github.com/arkenfox/user.js

  • 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.

    SurveyJS logo
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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