Firefox doesn't support container style queries

[nhoizey]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_containment/Container_size_and_style_queries

What specific section or headline is this issue about?

Baseline badge

What information was incorrect, unhelpful, or incomplete?

Firefox is shown with a green check, but it doesn't support container style queries.

What did you expect to see?

I think Firefox should have an orange cross, and Baseline should be "limited availability".

Do you have any supporting links, references, or citations?

The support table in the bottom of the page shoes Firefox lack of support.

Same on CanIUse: https://caniuse.com/mdn-css_at-rules_container_style_queries_for_custom_properties

Do you have anything more you want to share?

No response

MDN metadata

Page report details

• Folder: en-us/web/css/css_containment/container_size_and_style_queries
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_containment/Container_size_and_style_queries
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/css/css_containment/container_size_and_style_queries/index.md
• Last commit: 0663959
• Document last modified: 2025-08-13T02:06:22.000Z

[bsmth]

Thanks for reporting. The asterisk in the baseline banner shows * Some parts of this feature may have varying levels of support. It's green because @container has been supported since "Firefox 110 (Release date: ⁨2023-02-14⁩)".

We don't generally include spec tables or BCD in guide pages (like this one) anyway, so a good approach here might be to exclude until we have a more granular solution. In this case, that's achieved by removing the BCD front matter key.

[Josh-Cena]

Agreed; guide pages shouldn't have browser-compat keys. PR welcome to remove the front matter and the "Specifications" & "Browser compatibility" sections