Request for Mozilla Position on an Emerging Web Specification

• Specification title: CSS reading-flow
• Specification or proposal URL (if available): https://drafts.csswg.org/css-display-4/#reading-flow
• Explainer URL (if available): https://github.com/dizhang168/reading-order-items
• Proposal author(s) (@-mention GitHub accounts): @dizhang168, @mfreed7, @rachelandrew
• Caniuse.com URL (optional):
• Bugzilla URL (optional):
• Mozillians who can provide input (optional): @emilio
• WebKit standards-position: CSS reading-flow WebKit/standards-positions#378

Other information

The CSS Working Group has resolved to add the new reading-flow property (w3c/csswg-drafts#8589, spec) to enable focus navigation in visual order for layout items that might not be displayed in source order (such as grid, flex and masonry items). Chromium is implementing the new property and opened a whatwg/html#10407 on the needed HTML spec change.

We would like to seek Mozilla's position on implementing the CSS property.

Further, we would like to get feedback on the suggested HTML proposal and the open questions on display: contents (w3c/csswg-drafts#9230, whatwg/html#10533).