August 2026
CSS properties that became available in major browsers in August 2026.
text-box
property
MDN DocumentBrowser Support
Chrome
v133+2025-02-04Edge
v133+2025-02-06Safari
v18.2+2024-12-11Safari (iOS)
v18.2+2024-12-11Firefox
v154+2026-08-18
text-box-edge
property
MDN DocumentBrowser Support
Chrome
v133+2025-02-04Edge
v133+2025-02-06Safari
v18.2+2024-12-11Safari (iOS)
v18.2+2024-12-11Firefox
v154+2026-08-18
text-box-trim
property
MDN DocumentBrowser Support
Chrome
v133+2025-02-04Edge
v133+2025-02-06Safari
v18.2+2024-12-11Safari (iOS)
v18.2+2024-12-11Firefox
v154+2026-08-18
sibling-count
type
MDN DocumentBrowser Support
Chrome
v138+2025-06-24Edge
v138+2025-06-26Safari
v26.2+2025-12-12Safari (iOS)
v26.2+2025-12-12Firefox
v154+2026-08-18
sibling-index
type
MDN DocumentBrowser Support
Chrome
v138+2025-06-24Edge
v138+2025-06-26Safari
v26.2+2025-12-12Safari (iOS)
v26.2+2025-12-12Firefox
v154+2026-08-18