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Survey existing data conventions for method parameters, especially parameter objects

good first issueGood issues for getting started with this project.Good issues for getting started with this project.

help wantedYou're encouraged to pick up this issue, a maintainer will come back to you and review your work.You're encouraged to pick up this issue, a maintainer will come back to you and review your work.

Status: Open.

Task

#29572 In mdn/browser-compat-data;

· ddbeck opened on Apr 29, 2026

Popover - Safari breaks browser convention in how it translates popover components to screen-readers

acdAccessibility Compatibility DataAccessibility Compatibility Data

Status: Open.

#29566 In mdn/browser-compat-data;

· lolaodelola opened on Apr 29, 2026

css.at-rules.supports.at-rule - missing compat data for @supports at-rule()

data:cssCompat data for CSS features. https://developer.mozilla.org/docs/Web/CSSCompat data for CSS features. https://developer.mozilla.org/docs/Web/CSS

info neededThis needs more information to review or act on.This needs more information to review or act on.

Status: Open.

#29549 In mdn/browser-compat-data;

· 3ru opened on Apr 27, 2026

css.selectors.current - Missing compatibility data

data:cssCompat data for CSS features. https://developer.mozilla.org/docs/Web/CSSCompat data for CSS features. https://developer.mozilla.org/docs/Web/CSS

p3Medium priority – Community PRs encouraged.Medium priority – Community PRs encouraged.

Status: Open.

#29543 In mdn/browser-compat-data;

· patrickjh opened on Apr 26, 2026

Extend description linter for static API members

infraInfrastructure issues (npm, GitHub Actions, releases) of this projectInfrastructure issues (npm, GitHub Actions, releases) of this project

Status: Open.

#29537 In mdn/browser-compat-data;

· Elchi3 opened on Apr 24, 2026

api.Window.load_event - is not working as expected in the latest ios safari

data:apiCompat data for Web APIs. https://developer.mozilla.org/docs/Web/APICompat data for Web APIs. https://developer.mozilla.org/docs/Web/API

info neededThis needs more information to review or act on.This needs more information to review or act on.

Status: Open.

#29527 In mdn/browser-compat-data;

· rbatallasOshyn opened on Apr 22, 2026

Firefox release "retired" before new release is "current"

infraInfrastructure issues (npm, GitHub Actions, releases) of this projectInfrastructure issues (npm, GitHub Actions, releases) of this project

Status: Open.

#29522 In mdn/browser-compat-data;

· caugner opened on Apr 22, 2026

css.properties.baseline-shift - baseline value not documented

needs triageThis issue needs to be confirmedThis issue needs to be confirmed

Status: Open.

#29513 In mdn/browser-compat-data;

· estelle opened on Apr 20, 2026

api.Document.startViewTransition.updateCallback_parameter - Incorrect Firefox support

data:apiCompat data for Web APIs. https://developer.mozilla.org/docs/Web/APICompat data for Web APIs. https://developer.mozilla.org/docs/Web/API

needs collector testNeeds a custom BCD collector testNeeds a custom BCD collector test

p3Medium priority – Community PRs encouraged.Medium priority – Community PRs encouraged.

Status: Open.

#29455 In mdn/browser-compat-data;

· mathewhodson opened on Apr 10, 2026

api.PublicKeyCredential - should be supported in WebView

data:apiCompat data for Web APIs. https://developer.mozilla.org/docs/Web/APICompat data for Web APIs. https://developer.mozilla.org/docs/Web/API

p3Medium priority – Community PRs encouraged.Medium priority – Community PRs encouraged.

Status: Open.

#29452 In mdn/browser-compat-data;

· nsatragno opened on Apr 10, 2026

api.DeviceOrientationEvent is deprecated on Firefox, but this isn't mentioned on the page

data:apiCompat data for Web APIs. https://developer.mozilla.org/docs/Web/APICompat data for Web APIs. https://developer.mozilla.org/docs/Web/API

p3Medium priority – Community PRs encouraged.Medium priority – Community PRs encouraged.

Status: Open.

#29409 In mdn/browser-compat-data;

· leandrumartin opened on Apr 6, 2026

Bug: Installation toolchain still fails on Windows

infraInfrastructure issues (npm, GitHub Actions, releases) of this projectInfrastructure issues (npm, GitHub Actions, releases) of this project

Status: Open.

#29405 In mdn/browser-compat-data;

· hamishwillee opened on Apr 5, 2026