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FF150 ExprFeat: customElementRegistry on Document, Element, ShadowRoot#43592

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hamishwillee:ff150customelementregistry
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FF150 ExprFeat: customElementRegistry on Document, Element, ShadowRoot#43592
hamishwillee wants to merge 1 commit intomdn:mainfrom
hamishwillee:ff150customelementregistry

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FF150 added support for Element.customElementRegistry, Document.customElementRegistry ShadowRoot.customElementRegistry behind the preference dom.scoped-custom-element-registries.enabled.

This adds the experimental features page update and corresponding link from FF150 release note page.

Related docs work can be tracked in #43555

@hamishwillee hamishwillee requested a review from a team as a code owner March 27, 2026 04:48
@hamishwillee hamishwillee requested review from pepelsbey and removed request for a team March 27, 2026 04:48
@github-actions github-actions bot added Content:Firefox Content in the Mozilla/Firefox subtree size/s [PR only] 6-50 LoC changed labels Mar 27, 2026
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Preview URLs (2 pages)

External URLs (2)

URL: /en-US/docs/Mozilla/Firefox/Experimental_features
Title: Experimental features in Firefox


URL: /en-US/docs/Mozilla/Firefox/Releases/150
Title: Firefox 150 release notes for developers (Beta)

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