As far as I understand it XSLT has been disabled by default on Chrome Canary, Dev, and Beta since December 2nd 2025, and their origin trial scheduled to start yesterday. I'm not entirely sure this is what actually happened, and I don't know if that means that they would start running the origin trial on non-stable channels when it's been turned off for so long. But looking at https://developer.chrome.com/origintrials/#/view_trial/1902207892610613249 the starting version is indeed 152, which is the current release.
But just to be clear, are you suggesting that we should run our our origin trial for Nightly only until we unship this in Aug 2028? Andreas[2] [1] https://developer.chrome.com/docs/web-platform/deprecating-xslt#timeline_for_chrome correctly, [2] Sorry Jeff for the double reply, I forgot reply all On Wed, Aug 26, 2026 at 4:26 PM Jeff Muizelaar <[email protected]> wrote: > > It seems like this will break stuff on Nightly wherever Chrome currently has > an origin trial. Can we get that list from them? Without that list, it seems > like we're taking webcompat risk for limited gain. > > -Jeff > > On Wed, Aug 26, 2026 at 9:29 AM 'Andreas Farre' via [email protected] > <[email protected]> wrote: >> >> Summary: >> As has been described through other channels, XSLT is a rarely-used feature >> with a track record of being the source of many security issues. Most of its >> features have been directly superseded by other web platform functionality, >> and it’s lingering at a sub 0.1% use count. There are of course risks with >> removing a web feature but the arguments that the benefits outweigh the risk >> is exceptionally strong. For web developers, an option to mitigate breakage >> can be to use a polyfill[1], and for users an extension[2]. >> >> Removal would follow the conservative approach of: >> >> Offer an Enterprise Policy and a pref to disable XSLT support. (Already >> done.) >> >> Disable in Nightly as soon as possible. >> >> Disable in all channels in August 2027. This is when Chromium plans to >> remove their deprecation trial and enterprise policy (so that XSLT is >> disabled for all users). >> >> After that, entirely purge the code base of XSLT and corresponding tests. >> >> Bug: >> https://bugzilla.mozilla.org/show_bug.cgi?id=1990759 >> >> Specification: >> https://www.w3.org/TR/xslt-10/ >> >> Standards Body: >> W3C >> >> Platform Coverage: >> Initially this will ship to Nightly in >> https://bugzilla.mozilla.org/show_bug.cgi?id=2028408, for all platforms. >> Deprecation for all channels through >> https://bugzilla.mozilla.org/show_bug.cgi?id=2066712, and removal >> https://bugzilla.mozilla.org/show_bug.cgi?id=1990759. >> >> Preference: >> Deprecation is done through the pref “dom.xslt.enabled” >> >> DevTools Bug: >> None. >> >> Extensions Bug: >> None >> >> Use Counter: >> use.counter.page.xsltprocessor_constructor >> >> Standards-Positions Discussion: >> https://github.com/mozilla/standards-positions/issues/1287 >> >> Other Browsers: >> >> Blink: intent emailed >> https://groups.google.com/a/chromium.org/g/blink-dev/c/CxL4gYZeSJA/m/yNs4EsD5AQAJ >> >> WebKit: cautiously supportive >> https://github.com/whatwg/html/issues/11523#issuecomment-3149280766 >> >> web-platform-tests: >> https://wpt.fyi/results/xml/xslt >> >> >> [1] https://github.com/mfreed7/xslt_polyfill >> [2] https://addons.mozilla.org/firefox/search/?q=xslt+polyfill >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "[email protected]" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion visit >> https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CACvK8H%2BwWOyW%2BsKK1RbEgaL4r%2BnQqnW6ib9fFiRNTg%2BS3jy7cQ%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CACvK8HJ_P7eJT8hs7n3ioADj3%2B9HRJkHKggrb9N%3DBBc%2B35ZD_A%40mail.gmail.com.
