Firefox 66 is out with a whole bunch of interesting CSS features
Aspect ratio units, hiding content, the Firefox Shape Path editor, scroll anchoring.
CSS Regions, Fragmentation, Semantics to screen readers, triangles!
Grid and accessibility, Scroll Snap, Level 4 Selectors, position: sticky
How a screen reader user accesses the web, logical properties, feature queries, scroll snap.
How Browsers Provide Everything Users Need
Supporting browsers, scrolling, values and units, lonely icons, and SVG fill
Firefox 65, table design patterns, optimizing images and a grid scrabble board
Houdini, the dangers of styling forms, how well do you know CSS layout?
Lots of Grid, new Flex Inspector in Firefox, Multi-column Layout, Masonry.