BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +11, -0

Support increases (11)

API

  1. api ➞ EXT_texture_norm16
    Added to Firefox  ➞  3 of 3 engines
  2. api ➞ RTCPeerConnection ➞ cancelDiagnosticLogging_static Spec link
    Added to Chrome  ➞  1 of 3 engines
  3. api ➞ RTCPeerConnection ➞ startDiagnosticLogging_static Spec link
    Added to Chrome  ➞  1 of 3 engines
  4. api ➞ RTCPeerConnection ➞ stopDiagnosticLogging_static Spec link
    Added to Chrome  ➞  1 of 3 engines

CSS

  1. css ➞ selectors ➞ field-content Spec link
    Added to Safari  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ img ➞ controls Spec link
    Added to Safari  ➞  1 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride Spec link
    Added to Firefox  ➞  1 of 3 engines
  2. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ contexts_parameter Spec link
    Added to Firefox  ➞  1 of 3 engines
  3. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ features_parameter Spec link
    Added to Firefox  ➞  1 of 3 engines
  4. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ features_parameter ➞ prefers-color-scheme Spec link
    Added to Firefox  ➞  1 of 3 engines
  5. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ userContexts_parameter Spec link
    Added to Firefox  ➞  1 of 3 engines

BCD Metadata Changes: 130

Show all 130 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 (62)

The entries in this section saw support information change since the report on Monday, 12 October 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 ➞ GPUSupportedFeatures ➞ feature_clip-distances Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  2. api ➞ PerformanceResourceTiming ➞ deliveryType ➞ navigational-prefetch
    Backfilled for Firefox  ➞  3 of 3 engines
  3. api ➞ Request ➞ Request ➞ options_parameter ➞ body ➞ accepts_readablestream Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  4. api ➞ Request ➞ Request ➞ options_parameter ➞ duplex Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  5. api ➞ WebTransport ➞ responseHeaders Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  6. api ➞ fetch ➞ options_parameter ➞ body ➞ accepts_readablestream Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  7. api ➞ fetch ➞ options_parameter ➞ duplex Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  8. api ➞ EXT_polygon_offset_clamp Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  9. api ➞ EXT_polygon_offset_clamp ➞ polygonOffsetClampEXT Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  10. api ➞ GPUDevice ➞ createPipelineLayout ➞ descriptor_immediateSize_parameter Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  11. api ➞ PaymentRequest ➞ show ➞ returns_OperationError Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  12. api ➞ PaymentRequestEvent ➞ respondWith ➞ returns_OperationError Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  13. api ➞ Permissions ➞ permission_idle-detection Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  14. api ➞ WGSLLanguageFeatures ➞ extension_immediate_address_space Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  15. api ➞ console ➞ context_static
    Backfilled for Chrome  ➞  1 of 3 engines

CSS

  1. css ➞ properties ➞ link-parameters
    Backfilled for Safari  ➞  2 of 3 engines
  2. css ➞ properties ➞ link-parameters ➞ none Spec link
    Backfilled for Safari  ➞  2 of 3 engines
  3. css ➞ properties ➞ list-style ➞ symbols
    Backfilled for Safari  ➞  3 of 3 engines
  4. css ➞ properties ➞ list-style-type ➞ symbols
    Backfilled for Safari  ➞  3 of 3 engines
  5. css ➞ properties ➞ position-visibility ➞ anchor-valid Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  6. css ➞ properties ➞ position-visibility ➞ anchor-visible Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  7. css ➞ properties ➞ position-visibility ➞ anchors-valid Spec link
    Backfilled for Chrome  ➞  3 of 3 engines
  8. css ➞ properties ➞ ruby-overhang ➞ none Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  9. css ➞ properties ➞ text-decoration-inset
    Backfilled for Chrome  ➞  3 of 3 engines
  10. css ➞ properties ➞ text-decoration-inset ➞ auto Spec link
    Backfilled for Chrome  ➞  3 of 3 engines
  11. css ➞ properties ➞ block-ellipsis ➞ ellipsis Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  12. css ➞ properties ➞ content ➞ content_replacement Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  13. css ➞ properties ➞ continue ➞ normal Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  14. css ➞ properties ➞ fit-tolerance Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  15. css ➞ properties ➞ fit-tolerance ➞ infinite Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  16. css ➞ properties ➞ fit-tolerance ➞ normal Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  17. css ➞ properties ➞ line-clamp ➞ ellipsis Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  18. css ➞ properties ➞ max-lines ➞ auto Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  19. css ➞ properties ➞ max-size Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  20. css ➞ properties ➞ max-size ➞ fit-content Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  21. css ➞ properties ➞ max-size ➞ max-content Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  22. css ➞ properties ➞ max-size ➞ min-content Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  23. css ➞ properties ➞ max-size ➞ none Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  24. css ➞ properties ➞ max-size ➞ stretch Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  25. css ➞ properties ➞ min-size Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  26. css ➞ properties ➞ min-size ➞ auto Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  27. css ➞ properties ➞ min-size ➞ fit-content Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  28. css ➞ properties ➞ min-size ➞ max-content Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  29. css ➞ properties ➞ min-size ➞ min-content Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  30. css ➞ properties ➞ min-size ➞ stretch Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  31. css ➞ types ➞ color ➞ hsla Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  32. css ➞ types ➞ random-item Spec link
    Backfilled for Safari  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ script ➞ type ➞ speculationrules
    Backfilled for Firefox  ➞  2 of 3 engines
  2. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ eagerness
    Backfilled for Firefox  ➞  3 of 3 engines
  3. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ prefetch
    Backfilled for Firefox  ➞  3 of 3 engines
  4. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ urls
    Backfilled for Firefox  ➞  3 of 3 engines
  5. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ form_submission
    Backfilled for Chrome  ➞  1 of 3 engines
  6. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ source
    Backfilled for Firefox  ➞  2 of 3 engines

WEBASSEMBLY

  1. webassembly ➞ instructions ➞ add128
    Backfilled for Safari  ➞  2 of 3 engines
  2. webassembly ➞ instructions ➞ mul_wide_s
    Backfilled for Safari  ➞  2 of 3 engines
  3. webassembly ➞ instructions ➞ mul_wide_u
    Backfilled for Safari  ➞  2 of 3 engines
  4. webassembly ➞ instructions ➞ sub128
    Backfilled for Safari  ➞  2 of 3 engines
  5. webassembly ➞ type-reflection Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  6. webassembly ➞ wideArithmetic Spec link
    Backfilled for Firefox  ➞  2 of 3 engines

WEBEXTENSIONS

  1. webextensions ➞ api ➞ menus ➞ update ➞ icons
    Backfilled for Firefox  ➞  1 of 3 engines
  2. webextensions ➞ api ➞ menus ➞ update ➞ viewTypes
    Backfilled for Firefox  ➞  1 of 3 engines
  3. webextensions ➞ api ➞ menus ➞ update ➞ visible
    Backfilled for Firefox  ➞  3 of 3 engines

New entries (47)

The entries in this section were not found in BCD on Monday, 12 October 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 ➞ EXT_polygon_offset_clamp
  2. api ➞ EXT_polygon_offset_clamp ➞ polygonOffsetClampEXT
  3. api ➞ GPUDevice ➞ createPipelineLayout ➞ descriptor_immediateSize_parameter
  4. api ➞ PaymentRequest ➞ show ➞ returns_OperationError
  5. api ➞ PaymentRequestEvent ➞ respondWith ➞ returns_OperationError
  6. api ➞ Permissions ➞ permission_idle-detection
  7. api ➞ RTCPeerConnection ➞ cancelDiagnosticLogging_static
  8. api ➞ RTCPeerConnection ➞ startDiagnosticLogging_static
  9. api ➞ RTCPeerConnection ➞ stopDiagnosticLogging_static
  10. api ➞ WGSLLanguageFeatures ➞ extension_immediate_address_space
  11. api ➞ console ➞ context_static

CSS

  1. css ➞ properties ➞ block-ellipsis ➞ ellipsis
  2. css ➞ properties ➞ content ➞ content_replacement
  3. css ➞ properties ➞ continue ➞ normal
  4. css ➞ properties ➞ fit-tolerance
  5. css ➞ properties ➞ fit-tolerance ➞ infinite
  6. css ➞ properties ➞ fit-tolerance ➞ normal
  7. css ➞ properties ➞ line-clamp ➞ ellipsis
  8. css ➞ properties ➞ max-lines ➞ auto
  9. css ➞ properties ➞ max-size
  10. css ➞ properties ➞ max-size ➞ fit-content
  11. css ➞ properties ➞ max-size ➞ max-content
  12. css ➞ properties ➞ max-size ➞ min-content
  13. css ➞ properties ➞ max-size ➞ none
  14. css ➞ properties ➞ max-size ➞ stretch
  15. css ➞ properties ➞ min-size
  16. css ➞ properties ➞ min-size ➞ auto
  17. css ➞ properties ➞ min-size ➞ fit-content
  18. css ➞ properties ➞ min-size ➞ max-content
  19. css ➞ properties ➞ min-size ➞ min-content
  20. css ➞ properties ➞ min-size ➞ stretch
  21. css ➞ selectors ➞ field-content
  22. css ➞ types ➞ color ➞ hsla
  23. css ➞ types ➞ random-item

HTML

  1. html ➞ elements ➞ img ➞ controls
  2. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ form_submission
  3. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ source

WEBASSEMBLY

  1. webassembly ➞ type-reflection
  2. webassembly ➞ wideArithmetic

WEBDRIVER

  1. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride
  2. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ contexts_parameter
  3. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ features_parameter
  4. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ features_parameter ➞ prefers-color-scheme
  5. webdriver ➞ bidi ➞ emulation ➞ setMediaFeaturesOverride ➞ userContexts_parameter

WEBEXTENSIONS

  1. webextensions ➞ api ➞ menus ➞ update ➞ icons
  2. webextensions ➞ api ➞ menus ➞ update ➞ viewTypes
  3. webextensions ➞ api ➞ menus ➞ update ➞ visible

Removed entries (21)

The entries in this section were found in BCD on Monday, 12 October 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.

API

  1. api ➞ ShadowRoot ➞ afterHTML
  2. api ➞ ShadowRoot ➞ afterHTMLUnsafe
  3. api ➞ ShadowRoot ➞ beforeHTML
  4. api ➞ ShadowRoot ➞ beforeHTMLUnsafe
  5. api ➞ ShadowRoot ➞ replaceWithHTML
  6. api ➞ ShadowRoot ➞ replaceWithHTMLUnsafe
  7. api ➞ ShadowRoot ➞ streamAfterHTML
  8. api ➞ ShadowRoot ➞ streamAfterHTMLUnsafe
  9. api ➞ ShadowRoot ➞ streamBeforeHTML
  10. api ➞ ShadowRoot ➞ streamBeforeHTMLUnsafe
  11. api ➞ ShadowRoot ➞ streamReplaceWithHTML
  12. api ➞ ShadowRoot ➞ streamReplaceWithHTMLUnsafe

CSS

  1. css ➞ properties ➞ block-ellipsis ➞ auto
  2. css ➞ properties ➞ content ➞ element_replacement
  3. css ➞ properties ➞ continue ➞ auto
  4. css ➞ properties ➞ flow-tolerance
  5. css ➞ properties ➞ flow-tolerance ➞ infinite
  6. css ➞ properties ➞ flow-tolerance ➞ normal
  7. css ➞ properties ➞ line-clamp ➞ auto
  8. css ➞ properties ➞ max-lines ➞ none

HTML

  1. html ➞ elements ➞ script ➞ type ➞ speculationrules ➞ source_optional