Acceptance Criteria

• The listed features are documented sufficiently on MDN - NA
• BCD is updated
• Interactive example and data repos are updated if appropriate - NA
• 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 if feature is enabled in release
  or
• Add entry to Firefox experimental features page if feature is not yet enabled in release

Features to document

Support for @font-face src: descriptor's "tech(...)" syntax

Related Gecko bugs

https://bugzilla.mozilla.org/show_bug.cgi?id=1715546