Privacy Pass v3: the new privacy bits

Privacy Pass is an extension that helps users prove they are human without enabling tracking. It was first released in November 2017, allowing users to get tokens when solving a Cloudflare CAPTCHA and redeem them for other CAPTCHAs. In October 2019, the Privacy Pass Extension v2.0 added support for hCaptcha CAPTCHAs on any website. The latest version, Privacy Pass Extension v3.0, refactored the browser extension to improve maintainability and flexibility. It also introduced support for future service providers by using programmable modules instead of a configuration file. Additionally, the protocol was proposed as an Internet draft at IETF to ensure standard interoperability.