Found by driving Firefox 158 with real pointer, wheel and key input.
- Time picker wheels used padding to reach the last rows. Firefox leaves
bottom padding out of the scrollable area, so the last rows were
unreachable and the 24H/AM/PM wheel could not scroll at all. Spacer
pseudo-elements replace the padding.
- Wheels can now be dragged with a mouse or pen, with inertia, a rubber-band
at the ends and a spring back. Touch is left to the platform.
- Theme changes no longer use a page-wide view transition. The snapshot
could not blur what sits behind frosted glass, so every frosted surface
went clear for the length of the cross-fade.
- Dark shadows were invisible: black on a near-black canvas, with a deep
negative spread tucking the blur under the element. The dark canvas is
lifted, the shadows are stronger and the spreads milder.
- Same-page links now travel (scroll-behavior: smooth, motion permitting).
- data-nv-tristate: a checkbox that cycles unchecked, checked, partial; the
browser can display a partial state but a click can never choose it.
- Button groups show their pressed segment.
GUIDELINES.md gains the cross-engine rules these defects taught, and makes
Firefox the first browser to verify in.
check.py, build.py and build.py --check pass.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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