Issues

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

  needs triage
  mdn/browser-compat-data#30799 · Filter by author estelle opened on Oct 8, 2026

• Decouple unit tests from mutable BCD data

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

• css.properties.zoom - BCD does not match baseline

  data:cssneeds triage
  mdn/browser-compat-data#30789 · Filter by author estelle opened on Oct 8, 2026

• html.elements.script.type.importmap.integrity - Safari 26.6 blocks imports under Integrity-Policy

  data:htmlneeds triage
  mdn/browser-compat-data#30774 · Filter by author codingjoe opened on Oct 7, 2026
  2

• http.headers.Upgrade-Insecure-Requests - <S>

  data:httpneeds triage
  mdn/browser-compat-data#30769 · Filter by author jaysonasperilla706-byte opened on Oct 7, 2026

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

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

• javascript.builtins.Proxy.revocable - Chrome version_added should be 49, not 63

  needs triage
  mdn/browser-compat-data#30765 · Filter by author puckey opened on Oct 6, 2026

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

  data:htmlneeds triage
  mdn/browser-compat-data#30761 · Filter by author estelle opened on Oct 6, 2026
  1

• css.types.color.alpha: Chrome version_added should be 152, not 151

  needs triage
  mdn/browser-compat-data#30731 · Filter by author minimaldesign opened on Oct 4, 2026

• 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

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

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

• 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

• getDisplayMedia() - Safari on IOS 27 is incorrectly listed as unsupported

  browser:safari_iosdata:apineeds collector run
  mdn/browser-compat-data#30654 · Filter by author solarsoul-star opened on Sep 24, 2026
  2

• 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

• Add missing compatibility data for menus.update() properties

  data:webext
  mdn/browser-compat-data#30615 · Filter by author BHUVANSH855 opened on Sep 22, 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