Bug 297438 does not depend on any bugs.

Bug 297438 blocks one bug:

•    297438: [css-anchor-position-1] Last-successful position fallback doesn't apply on anchoreum.com [RESOLVED FIXED; assigned to kiet.ho]
  •    291856: [css-anchor-position-1] CSS Anchor Positioning Level 1 Dependencies [NEW; assigned to webkit-unassigned]