BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +40, -0

Support increases (40)

API

  1. api ➞ CanvasRenderingContext2D ➞ lang
    Added to Firefox  ➞  2 of 3 engines
  2. api ➞ DocumentPictureInPicture ➞ requestWindow ➞ option_disallowReturnToOpener Spec link
    Added to Firefox  ➞  2 of 3 engines
  3. api ➞ GPURenderBundleEncoder ➞ setVertexBuffer ➞ unset_vertex_buffer
    Added to Firefox  ➞  3 of 3 engines
  4. api ➞ GPURenderPassEncoder ➞ setVertexBuffer ➞ unset_vertex_buffer
    Added to Firefox  ➞  3 of 3 engines
  5. api ➞ GPUSupportedLimits ➞ maxStorageBuffersInFragmentStage Spec link
    Added to Firefox  ➞  2 of 3 engines
  6. api ➞ GPUSupportedLimits ➞ maxStorageBuffersInVertexStage Spec link
    Added to Firefox  ➞  2 of 3 engines
  7. api ➞ GPUSupportedLimits ➞ maxStorageTexturesInFragmentStage Spec link
    Added to Firefox  ➞  2 of 3 engines
  8. api ➞ GPUSupportedLimits ➞ maxStorageTexturesInVertexStage Spec link
    Added to Firefox  ➞  2 of 3 engines
  9. api ➞ Navigator ➞ serial
    Added to Firefox  ➞  2 of 3 engines
  10. api ➞ OffscreenCanvasRenderingContext2D ➞ lang
    Added to Firefox  ➞  2 of 3 engines
  11. api ➞ Serial
    Added to Firefox  ➞  2 of 3 engines
  12. api ➞ Serial ➞ getPorts
    Added to Firefox  ➞  2 of 3 engines
  13. api ➞ Serial ➞ requestPort
    Added to Firefox  ➞  2 of 3 engines
  14. api ➞ SerialPort
    Added to Firefox  ➞  2 of 3 engines
  15. api ➞ SerialPort ➞ close
    Added to Firefox  ➞  2 of 3 engines
  16. api ➞ SerialPort ➞ connect_event
    Added to Firefox  ➞  2 of 3 engines
  17. api ➞ SerialPort ➞ connected
    Added to Firefox  ➞  2 of 3 engines
  18. api ➞ SerialPort ➞ disconnect_event
    Added to Firefox  ➞  2 of 3 engines
  19. api ➞ SerialPort ➞ forget
    Added to Firefox  ➞  2 of 3 engines
  20. api ➞ SerialPort ➞ getInfo
    Added to Firefox  ➞  2 of 3 engines
  21. api ➞ SerialPort ➞ getSignals
    Added to Firefox  ➞  2 of 3 engines
  22. api ➞ SerialPort ➞ open
    Added to Firefox  ➞  2 of 3 engines
  23. api ➞ SerialPort ➞ readable
    Added to Firefox  ➞  2 of 3 engines
  24. api ➞ SerialPort ➞ setSignals
    Added to Firefox  ➞  2 of 3 engines
  25. api ➞ SerialPort ➞ writable
    Added to Firefox  ➞  2 of 3 engines
  26. api ➞ WorkerNavigator ➞ serial
    Added to Firefox  ➞  2 of 3 engines
  27. api ➞ CSSContainerRule ➞ conditions Spec link
    Added to Firefox  ➞  1 of 3 engines
  28. api ➞ LanguageModel Spec link
    Added to Chrome  ➞  1 of 3 engines
  29. api ➞ LanguageModel ➞ append Spec link
    Added to Chrome  ➞  1 of 3 engines
  30. api ➞ LanguageModel ➞ availability_static Spec link
    Added to Chrome  ➞  1 of 3 engines
  31. api ➞ LanguageModel ➞ clone Spec link
    Added to Chrome  ➞  1 of 3 engines
  32. api ➞ LanguageModel ➞ contextUsage Spec link
    Added to Chrome  ➞  1 of 3 engines
  33. api ➞ LanguageModel ➞ contextWindow Spec link
    Added to Chrome  ➞  1 of 3 engines
  34. api ➞ LanguageModel ➞ contextoverflow_event Spec link
    Added to Chrome  ➞  1 of 3 engines
  35. api ➞ LanguageModel ➞ create_static Spec link
    Added to Chrome  ➞  1 of 3 engines
  36. api ➞ LanguageModel ➞ measureContextUsage Spec link
    Added to Chrome  ➞  1 of 3 engines
  37. api ➞ LanguageModel ➞ prompt Spec link
    Added to Chrome  ➞  1 of 3 engines
  38. api ➞ LanguageModel ➞ promptStreaming Spec link
    Added to Chrome  ➞  1 of 3 engines

CSS

  1. css ➞ properties ➞ position-anchor ➞ normal Spec link
    Added to Firefox  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ iframe ➞ allow ➞ serial Spec link
    Added to Firefox  ➞  2 of 3 engines

BCD Metadata Changes: 44

Show all 44 changes

Note: The following represent changes to BCD metadata keys in the reported time period. Keys are not implementations, and they don't represent commitments toward implementation, etc. A new key occurring is perhaps a signal that some implementer was serious enough to add the key. Many of the features that are 'removed' are usually just 'moved' or 'renamed', but we don't have great ways to highlight that.

Backfilled entries (16)

The entries in this section saw support information change since the report on Friday, 17 April 2026, but all the supported browser versions given were more than a couple of months old. Typically, these are cases of support information being updated long after the support actually landed in a browser, but nobody ever updated the BCD entry.

API

  1. api ➞ FileSystemHandle ➞ move
    Backfilled for Chrome  ➞  3 of 3 engines

HTML

  1. html ➞ elements ➞ input ➞ type_color ➞ list
    Backfilled for Firefox  ➞  3 of 3 engines

HTTP

  1. http ➞ headers ➞ Integrity-Policy
    Backfilled for Safari  ➞  3 of 3 engines
  2. http ➞ headers ➞ Integrity-Policy ➞ blocked-destinations_script Spec link
    Backfilled for Safari  ➞  3 of 3 engines
  3. http ➞ headers ➞ Integrity-Policy-Report-Only
    Backfilled for Safari  ➞  3 of 3 engines
  4. http ➞ headers ➞ Integrity-Policy-Report-Only ➞ blocked-destinations_script Spec link
    Backfilled for Safari  ➞  3 of 3 engines
  5. http ➞ headers ➞ Permissions-Policy-Report-Only
    Backfilled for Chrome  ➞  1 of 3 engines

CSS

  1. css ➞ properties ➞ accent-color ➞ currentColor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  2. css ➞ properties ➞ color ➞ currentColor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  3. css ➞ properties ➞ column-rule ➞ currentColor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  4. css ➞ properties ➞ column-rule-color ➞ currentColor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  5. css ➞ properties ➞ outline-color ➞ currentColor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  6. css ➞ properties ➞ stop-color ➞ currentColor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  7. css ➞ types ➞ attr ➞ attr-name_accepts_namespaces
    Backfilled for Firefox  ➞  1 of 3 engines
  8. css ➞ types ➞ global_keywords ➞ revert-rule
    Backfilled for Firefox  ➞  3 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ script ➞ getRealms ➞ type_parameter ➞ window Spec link
    Backfilled for Firefox  ➞  1 of 3 engines

New entries (23)

The entries in this section were not found in BCD on Friday, 17 April 2026, but are now present. These usually do not have any support information attached to them, and often have no corresponding MDN page. Sometimes, entries that appear here also appear in the next section (“Removed BCD entries”) because of a Working Group deciding on a rename.

API

  1. api ➞ CSSContainerRule ➞ conditions
  2. api ➞ LanguageModel
  3. api ➞ LanguageModel ➞ append
  4. api ➞ LanguageModel ➞ availability_static
  5. api ➞ LanguageModel ➞ clone
  6. api ➞ LanguageModel ➞ contextUsage
  7. api ➞ LanguageModel ➞ contextWindow
  8. api ➞ LanguageModel ➞ contextoverflow_event
  9. api ➞ LanguageModel ➞ create_static
  10. api ➞ LanguageModel ➞ measureContextUsage
  11. api ➞ LanguageModel ➞ prompt
  12. api ➞ LanguageModel ➞ promptStreaming

CSS

  1. css ➞ properties ➞ accent-color ➞ currentColor
  2. css ➞ properties ➞ color ➞ currentColor
  3. css ➞ properties ➞ column-rule ➞ currentColor
  4. css ➞ properties ➞ column-rule-color ➞ currentColor
  5. css ➞ properties ➞ outline-color ➞ currentColor
  6. css ➞ properties ➞ position-anchor ➞ normal
  7. css ➞ properties ➞ stop-color ➞ currentColor
  8. css ➞ types ➞ attr ➞ attr-name_accepts_namespaces
  9. css ➞ types ➞ global_keywords ➞ revert-rule

HTTP

  1. http ➞ headers ➞ Permissions-Policy-Report-Only

WEBDRIVER

  1. webdriver ➞ bidi ➞ script ➞ getRealms ➞ type_parameter ➞ window

Removed entries (5)

The entries in this section were found in BCD on Friday, 17 April 2026, but are no longer present. The reasons for this removal can be anything from an experimental proposal that was never supported to a property or value being renamed to something else.

CSS

  1. css ➞ properties ➞ all ➞ revert-rule
  2. css ➞ properties ➞ font-family ➞ fangsong
  3. css ➞ properties ➞ font-family ➞ kai
  4. css ➞ properties ➞ font-family ➞ khmer-mul
  5. css ➞ properties ➞ font-family ➞ nastaliq