Issues

• Chrome 155+ release notes missing

  bugdata:browsersinfra
  mdn/browser-compat-data#30877 · Filter by author caugner opened on Oct 15, 2026
  

• api.Element.contextmenu_event - Opening popovers from contextmenu eventlistener

  data:apimeeting agenda
  mdn/browser-compat-data#30848 · Filter by author jamesnw opened on Oct 12, 2026
  5

• http.headers.Cross-Origin-Embedder-Policy-Report-Only and Cross-Origin-Opener-Policy-Report-Only - missing BCD entries

  data:httpp3
  mdn/browser-compat-data#30837 · Filter by author BHUVANSH855 opened on Oct 11, 2026
  3

• html.elements.iframe.allow: missing local-network, local-network-access, and loopback-network entries

  data:htmlp3
  mdn/browser-compat-data#30831 · Filter by author BHUVANSH855 opened on Oct 10, 2026

• css.properties.letter-spacing - Safari 7 and Firefox 45 percentage support is wrong

  browser:firefoxbrowser:safaridata:css
  mdn/browser-compat-data#30826 · Filter by author 1jj opened on Oct 9, 2026
  1

• WebExtension types - data not indicating type exposure

  data:webextneeds triage
  mdn/browser-compat-data#30817 · Filter by author carlosjeurissen opened on Oct 9, 2026
  3

• css.properties.appearance.base-select - <select multiple size="1"> issue

  data:cssinfo needed
  mdn/browser-compat-data#30799 · Filter by author estelle opened on Oct 8, 2026
  1

• Decouple unit tests from mutable BCD data

  infra
  mdn/browser-compat-data#30795 · Filter by author caugner opened on Oct 8, 2026
  

• css.properties.text-decoration - blink incorrectly marked for Edge browser

  browser:edgedata:cssp4
  mdn/browser-compat-data#30768 · Filter by author scottaohara opened on Oct 6, 2026

• html.elements.select - missing <select size=1 multiple> support data

  browser:chromedata:htmlnon-required behaviorp3
  mdn/browser-compat-data#30761 · Filter by author estelle opened on Oct 6, 2026
  2

• css.properties.column-rule - flex/grid support in webkit

  data:cssneeds triage
  mdn/browser-compat-data#30711 · Filter by author nchilla opened on Oct 1, 2026
  1

• api.Worker.Worker - Worker()-Constructor Support in SharedWorkers not explained

  data:apimeeting agenda
  mdn/browser-compat-data#30707 · Filter by author Jakob-Khn opened on Sep 30, 2026
  1

• http.headers.Permissions-Policy - local-network and loopback-network missing Firefox support version

  browser:firefoxdata:httpp3
  mdn/browser-compat-data#30678 · Filter by author dasa opened on Sep 25, 2026

• serializable_object subfeatures point to the same MDN glossary page

  meeting agenda
  mdn/browser-compat-data#30653 · Filter by author JinDX opened on Sep 24, 2026
  1

• http.headers.Clear-Site-Data.cookies - Safari clears only host-only cookies, not the registered domain

  browser:safaridata:http
  mdn/browser-compat-data#30649 · Filter by author kawaz opened on Sep 24, 2026

• css.properties.display.is_transitionable — Safari 27 disables display transitions for popovers and <dialog>

  browser:safaridata:cssmeeting agenda
  mdn/browser-compat-data#30560 · Filter by author milanegberink opened on Sep 17, 2026
  2

• api.PublicKeyCredential - missing platform-specific compatibility for desktop operating systems

  data:apimeeting agendaplatform limitation
  mdn/browser-compat-data#30559 · Filter by author micolous opened on Sep 17, 2026
  2

• margin-trim is only partially supported in Safari

  browser:safaridata:css
  mdn/browser-compat-data#30528 · Filter by author rachelandrew opened on Sep 15, 2026
  3

• [meta] PR Review Companion improvements

  enhancementinfra
  mdn/browser-compat-data#30485 · Filter by author caugner opened on Sep 11, 2026

• Alert reviewers when most but not all keys with the same web-features tag are modified in a PR

  enhancementinfra
  mdn/browser-compat-data#30483 · Filter by author ddbeck opened on Sep 11, 2026
  1

• html.elements.dialog - closedby=any bugs for touch

  browser:chromebrowser:firefoxdata:htmlp3
  mdn/browser-compat-data#30474 · Filter by author kirk-loretz-fsn opened on Sep 11, 2026
  1

• html.global_attributes.focusgroup etc. - missing data

  browser:chromedata:htmlneeds collector test
  mdn/browser-compat-data#30468 · Filter by author ddbeck opened on Sep 10, 2026
  1

• flex-start and flex-end - No support data for these values

  browser:multipledata:cssp2
  mdn/browser-compat-data#30410 · Filter by author ddbeck opened on Sep 3, 2026
  2

  

• Wasm js-types proposal - missing

  browser:multipledata:wasmp3
  mdn/browser-compat-data#30393 · Filter by author Josh-Cena opened on Sep 2, 2026

• Add api.HTMLElement* constructor data

  data:api
  mdn/browser-compat-data#30380 · Filter by author Elchi3 opened on Sep 1, 2026
  1