BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +6, -0

Support increases (6)

API

  1. api ➞ Navigation ➞ currententrychange_event
    Added to Safari  ➞  3 of 3 engines
  2. api ➞ Navigation ➞ navigate_event
    Added to Safari  ➞  3 of 3 engines
  3. api ➞ Navigation ➞ navigateerror_event
    Added to Safari  ➞  3 of 3 engines
  4. api ➞ Navigation ➞ navigatesuccess_event
    Added to Safari  ➞  3 of 3 engines
  5. api ➞ PointerEvent ➞ pointerType ➞ fractional_coordinates
    Added to Safari  ➞  3 of 3 engines

CSS

  1. css ➞ properties ➞ font-family ➞ math
    Added to Safari  ➞  3 of 3 engines

BCD Metadata Changes: 24

Show all 24 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 (5)

The entries in this section saw support information change since the report on Wednesday, 17 December 2025, 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.

JAVASCRIPT

  1. javascript ➞ builtins ➞ Intl ➞ Locale ➞ variants
    Backfilled for Safari  ➞  2 of 3 engines

CSS

  1. css ➞ types ➞ color ➞ color ➞ colorSpace_parameter_accepts_display-p3-linear_value Spec link
    Backfilled for Firefox  ➞  3 of 3 engines

HTTP

  1. http ➞ headers ➞ Accept-CH ➞ Sec-CH-Width Spec link
    Backfilled for Chrome  ➞  1 of 3 engines

WEBEXTENSIONS

  1. webextensions ➞ api ➞ proxy ➞ ProxyInfo ➞ masqueTemplate
    Backfilled for Firefox  ➞  1 of 3 engines
  2. webextensions ➞ api ➞ proxy ➞ ProxyInfo ➞ type
    Backfilled for Firefox  ➞  1 of 3 engines

New entries (19)

The entries in this section were not found in BCD on Wednesday, 17 December 2025, 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.

CSS

  1. css ➞ types ➞ color ➞ color ➞ colorSpace_parameter_accepts_display-p3-linear_value

HTML

  1. html ➞ elements ➞ meta ➞ name ➞ viewport
  2. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ height
  3. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ initial-scale
  4. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ interactive-widget
  5. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ interactive-widget ➞ overlays-content
  6. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ interactive-widget ➞ resizes-content
  7. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ interactive-widget ➞ resizes-visual
  8. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ maximum-scale
  9. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ minimum-scale
  10. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ user-scalable
  11. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ viewport-fit
  12. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ viewport-fit ➞ auto
  13. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ viewport-fit ➞ cover
  14. html ➞ elements ➞ meta ➞ name ➞ viewport ➞ width

HTTP

  1. http ➞ headers ➞ Accept-CH ➞ Sec-CH-Width
  2. http ➞ headers ➞ Sec-CH-Width

WEBEXTENSIONS

  1. webextensions ➞ api ➞ proxy ➞ ProxyInfo ➞ masqueTemplate
  2. webextensions ➞ api ➞ proxy ➞ ProxyInfo ➞ type

Removed entries (0)

No features were removed from bcd in this time period