Removing XSLT from Chromium

Mason Freed and Dominik Röttsches have published a document
with a timeline and plans for removing Extensible Stylesheet Language
Transformations (XSLT) from the Chromium project and Chrome
browser:

Chromium has officially deprecated XSLT, including the XSLTProcessor
JavaScript API and the XML stylesheet processing instruction. We
intend to remove support from version 155 (November 17, 2026). The
Firefox and WebKit projects have also indicated plans to remove XSLT
from their browser engines. This document provides some history and
context, explains how we are removing XSLT to make Chrome safer, and
provides a path for migrating before these features are removed from
the browser.

LWN covered the Web
Hypertext Application Technology Working Group (WHATWG) discussion
about XSLT in August.