Acceptance criteria

• The listed features are documented sufficiently on MDN
• BCD is updated
• Interactive example and data repos are updated if appropriate
• The content has been reviewed as needed

For folks helping with Firefox related documentation

• Set bugs to dev-doc-complete
• Add entry to Firefox release notes for enabled/preview features
• Add/remove entry to Firefox experimental features page for preference/released features

Related Gecko bugs

https://bugzilla.mozilla.org/show_bug.cgi?id=2030645

The following are related and ensure we cover the scope of this feature
https://bugzilla.mozilla.org/show_bug.cgi?id=2019254 - Parsing and matching support for multiple comma-separated conditions in @ container rules
https://bugzilla.mozilla.org/show_bug.cgi?id=2024601 -
Resolve attr(...) references within container style queries
https://bugzilla.mozilla.org/show_bug.cgi?id=2016929 - [meta] Support multiple comma-separated queries in @ container rules

Other

• Check content open issues to see if any pertain to the subject matter. If there are any that can be closed because of the work, do so. If there are any that can be fixed relatively quickly because of the knowledge from completing this issue and you have time, feel free to go ahead and fix them.