Issues

• Release Notes for Safari Technology Preview 255 — XMLHttpRequest/fetch regression fix

  impact:breakingtriageurgency:high
  getsentry/browser-updates-radar#46 · Filter by author github-actions opened on Oct 26, 2026

• Blocking Identity Resolution Infrastructure

  impact:breakingtriageurgency:high
  getsentry/browser-updates-radar#45 · Filter by author github-actions opened on Oct 26, 2026

• Connection Allowlists – Embedded Enforcement

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#44 · Filter by author github-actions opened on Oct 12, 2026

• Safari TP 254: pagehide/visibilitychange/unload suppressed in cross-site navigation + CSP violation events fixed in workers

  impact:breakingtriageurgency:high
  getsentry/browser-updates-radar#43 · Filter by author github-actions opened on Oct 12, 2026

• Resource timing: get encoded/decoded body size with CORS instead of TAO

  impact:breakingtriageupdatedurgency:med
  getsentry/browser-updates-radar#42 · Filter by author github-actions opened on Oct 12, 2026
  1

• HTML-in-canvas

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#41 · Filter by author github-actions opened on Oct 5, 2026

• Long Animation Frames style and layout duration

  impact:opportunitytriageupdatedurgency:med
  getsentry/browser-updates-radar#39 · Filter by author github-actions opened on Oct 5, 2026
  2

• Disallow spaces in non-file:// URL hosts

  impact:breakingtriageurgency:med
  getsentry/browser-updates-radar#37 · Filter by author github-actions opened on Sep 28, 2026

• Prerendering cross-origin iframes

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#34 · Filter by author github-actions opened on Sep 21, 2026

• WebKit Features for Safari 27.0

  impact:opportunitytriageurgency:med
  getsentry/browser-updates-radar#36 · Filter by author github-actions opened on Sep 21, 2026

• Optional browser optimization for Service Workers (ServiceWorkerAutoPreload)

  impact:watchtriageurgency:med
  getsentry/browser-updates-radar#32 · Filter by author github-actions opened on Sep 14, 2026

• Avoid caching module failures

  impact:opportunitytriageupdatedurgency:low
  getsentry/browser-updates-radar#33 · Filter by author github-actions opened on Sep 14, 2026
  2

• Remove FencedFrame element and window.fence APIs

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#30 · Filter by author github-actions opened on Sep 14, 2026

• js-profiling in dedicated workers

  impact:opportunitytriageurgency:med
  getsentry/browser-updates-radar#31 · Filter by author github-actions opened on Sep 14, 2026

• Fetch API: Forward reason from AbortController to fetch Response

  impact:opportunitytriageurgency:low
  getsentry/browser-updates-radar#24 · Filter by author github-actions opened on Aug 25, 2026

• CORS enforcement for Background Fetch

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#25 · Filter by author github-actions opened on Aug 25, 2026

• Support Long Animation Frames API in Web Workers

  impact:opportunitytriageupdatedurgency:med
  getsentry/browser-updates-radar#22 · Filter by author github-actions opened on Aug 25, 2026
  1

• JS Self-Profiling Markers

  impact:opportunityupdatedurgency:med
  getsentry/browser-updates-radar#23 · Filter by author github-actions opened on Aug 25, 2026
  2

  

• Renewed HTML insertion & streaming methods

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#21 · Filter by author github-actions opened on Jul 27, 2026

• Declarative Performance Observer

  impact:opportunitytriageurgency:med
  getsentry/browser-updates-radar#19 · Filter by author github-actions opened on Jul 27, 2026

• Declarative Shadow DOM 'shadowrootadoptedstylesheets'

  impact:watchtriageurgency:low
  getsentry/browser-updates-radar#20 · Filter by author github-actions opened on Jul 27, 2026

• CPU Performance API

  impact:opportunityurgency:low
  getsentry/browser-updates-radar#17 · Filter by author github-actions opened on Jul 20, 2026
  1

• Prefetch activation beacon

  impact:opportunitytriageurgency:low
  getsentry/browser-updates-radar#16 · Filter by author github-actions opened on Jul 13, 2026

• Reference Target for Cross-root ARIA

  impact:opportunitytriageurgency:low
  getsentry/browser-updates-radar#15 · Filter by author github-actions opened on Jul 13, 2026

• Deprecate and Remove: Related Website Sets (RWS)

  impact:watchtriageurgency:med
  getsentry/browser-updates-radar#13 · Filter by author github-actions opened on Jul 13, 2026