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Pull requests: mdn/browser-compat-data
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Add CSS Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
size:m
[PR only] 25-100 LoC changed
<timeline-range-name>
data:css
#29683
opened May 15, 2026 by
dletorey
Contributor
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Move popover=hint to partial given new spec
data:html
Compat data for HTML elements. https://developer.mozilla.org/docs/Web/HTML
size:s
[PR only] 7-24 LoC changed
#29676
opened May 14, 2026 by
jakearchibald
Contributor
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Firefox Nightly adds CSS Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
size:m
[PR only] 25-100 LoC changed
field-sizing
data:css
#29673
opened May 13, 2026 by
dletorey
Contributor
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Embellish Issues or pull requests regarding the documentation of this project.
size:s
[PR only] 7-24 LoC changed
partial_implementation guideline
docs
#29661
opened May 12, 2026 by
ddbeck
Contributor
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Node.js 15.3.0…26.0.0
data:api
Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
data:browsers
Data about browsers (versions, release dates, etc). This data is used for validation.
data:js
Compat data for JS/ECMAScript features. https://developer.mozilla.org/docs/Web/JavaScript
data:wasm
Compat data for Web Assembly features. https://developer.mozilla.org/en-US/docs/WebAssembly
size:xl
[PR only] >1000 LoC changed
feat(scripts/release): list renamed features in release notes
infra
Infrastructure issues (npm, GitHub Actions, releases) of this project
scripts
Issues or pull requests regarding the scripts in scripts/.
size:l
[PR only] 101-1000 LoC changed
feat(lint): check descriptions of static members
data:api
Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
infra
Infrastructure issues (npm, GitHub Actions, releases) of this project
linter
Issues or pull requests regarding the tests / linter of the JSON files.
size:l
[PR only] 101-1000 LoC changed
PlatformArch values support details
data:webext
Compat data for Browser Extensions. https://developer.mozilla.org/Add-ons/WebExtensions
size:l
[PR only] 101-1000 LoC changed
feat(lint): replace code tags in descriptions + notes
data:api
Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
data:webext
Compat data for Browser Extensions. https://developer.mozilla.org/Add-ons/WebExtensions
infra
Infrastructure issues (npm, GitHub Actions, releases) of this project
linter
Issues or pull requests regarding the tests / linter of the JSON files.
size:l
[PR only] 101-1000 LoC changed
fix(lint): add MDN urls for features with Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
infra
Infrastructure issues (npm, GitHub Actions, releases) of this project
merge conflicts 🚧
This PR needs to merge latest "main" branch to resolve a merge conflict or other issue.
size:m
[PR only] 25-100 LoC changed
@@ prefix
data:api
Add partial implementation notes for align-self, justify-self, and place-self properties on absolute positioned elements
data:css
Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
size:m
[PR only] 25-100 LoC changed
#29342
opened Mar 25, 2026 by
captainbrosset
Contributor
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feat(schemas): separate public from internal schema
bulk_update
An update to a mass amount of data, or scripts/linters related to such changes
docs
Issues or pull requests regarding the documentation of this project.
infra
Infrastructure issues (npm, GitHub Actions, releases) of this project
linter
Issues or pull requests regarding the tests / linter of the JSON files.
schema
Isses or pull requests regarding the JSON schema files used in this project.
scripts
Issues or pull requests regarding the scripts in scripts/.
semver-major-bump
A change that is potentially breaking for consumers
size:xl
[PR only] >1000 LoC changed
#29041
opened Feb 13, 2026 by
caugner
Contributor
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refactor(test): migrate from mocha to node:test/assert
bulk_update
An update to a mass amount of data, or scripts/linters related to such changes
dependencies
Pull requests that update a dependency package or file.
infra
Infrastructure issues (npm, GitHub Actions, releases) of this project
linter
Issues or pull requests regarding the tests / linter of the JSON files.
merge conflicts 🚧
This PR needs to merge latest "main" branch to resolve a merge conflict or other issue.
scripts
Issues or pull requests regarding the scripts in scripts/.
size:l
[PR only] 101-1000 LoC changed
Chrome 144 :current support
data:css
Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
size:m
[PR only] 25-100 LoC changed
#28882
opened Jan 21, 2026 by
chrisdavidmills
Contributor
•
Draft
Issue-28341 webextension.api documentId and parentDocumentId updates
data:webext
Compat data for Browser Extensions. https://developer.mozilla.org/Add-ons/WebExtensions
size:l
[PR only] 101-1000 LoC changed
#28790
opened Jan 9, 2026 by
rebloor
Contributor
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Unmark Firefox as partial for Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
meeting agenda
Issues or pull requests in need of discussion in a project meeting.
merge conflicts 🚧
This PR needs to merge latest "main" branch to resolve a merge conflict or other issue.
size:s
[PR only] 7-24 LoC changed
::highlight CSS selector
data:css
Chrome 110 applies User-Agent reduction to Navigator properties + Blocked and unable to proceed.
data:api
Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
data:http
Compat data for HTTP features. https://developer.mozilla.org/docs/Web/HTTP
size:l
[PR only] 101-1000 LoC changed
User-Agent header
blocked
#28275
opened Oct 23, 2025 by
chrisdavidmills
Contributor
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Add more spec_urls; set some standard_tracks to false (APIs A-E)
data:api
Compat data for Web APIs. https://developer.mozilla.org/docs/Web/API
linter
Issues or pull requests regarding the tests / linter of the JSON files.
merge conflicts 🚧
This PR needs to merge latest "main" branch to resolve a merge conflict or other issue.
size:l
[PR only] 101-1000 LoC changed
Update all browsers data for global_attributes SVG feature
data:svg
Compat data for SVG features. https://developer.mozilla.org/docs/Web/SVG
merge conflicts 🚧
This PR needs to merge latest "main" branch to resolve a merge conflict or other issue.
size:l
[PR only] 101-1000 LoC changed
#27389
opened Jul 23, 2025 by
queengooborg
Contributor
•
Draft
Update all browsers data for text-orientation CSS property
data:css
Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
size:s
[PR only] 7-24 LoC changed
#27189
opened Jun 30, 2025 by
queengooborg
Contributor
•
Draft
Chrome 8 added Compat data for CSS features. https://developer.mozilla.org/docs/Web/CSS
size:xs
[PR only] 0-6 LoC changed
speak CSS property
data:css
#27188
opened Jun 30, 2025 by
queengooborg
Contributor
•
Draft
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ProTip!
Adding no:label will show everything without a label.