Support multiple queries per @container rule. The @container rule applies if at least one of the queries matches. This makes it possible to have fallback queries for features which are not supported in all browsers, for instance. Example: @container --name1 not-supported(--foo: bar), --name2 (width > 600px) {} Along with the support for multiple queries, the object model is extended to support the 'conditions' attribute on the CSSContainerRule API.
Catching up with the specification and improve interoperability (covered by Interop 2026)