Intent to prototype: ::file-chooser-button

*Summary:* Add a pseudo-element to file inputs in order to expose the internal "Browse" button. Since there's no spec yet, and the name might change, I plan to /not/ ship it just yet, and keep it Nightly / Dev Edition only for now until the dust settles. *Bug:* bug 1635675

Intent to prototype: CSS aspect-ratio in [css-sizing-4]

*Summary*: This property sets a "preferred aspect ratio" for the box, which will be used in the calculation of auto sizes and some other layout functions. (Note: If a box has both a width and a height that are not automatic, then the preferred aspect ratio has no effect.) Example: A very simple cas

Handing off W3C Advisory Committee duties

For quite a while, I've been posting reviews of proposed W3C charters and W3C Proposed Recommendations to this list, as part of being Mozilla's representative to the W3C Advisory Committee, which really means the person who expresses official Mozilla positions on things to W3C, and designates Mozil