Scoping Property Registrations in Shadows - related to the many other "maybe shadows should scope CSSy things" topics. (Related: https://github.com/w3c/csswg-drafts/issues/1995) (tabatkins)

CSS Properties and Values: Performance concerns (smfr)

Font Enumeration API Web API for enumerating fonts on the local system (inexorabletash)

Font Table Access Web API for accessing TrueType/OpenType font tables (inexorabletash)

CSS Layout API: Inlinifying Removing childDisplay: 'normal' , and replacing with childDisplay: 'inline'. (ikilpatrick, presumably?)

Web Assembly Integration (bz?)