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An iPad, desktop, and an iPhone each displaying a browser showing an image of a 3D hiking boot model.
Webstrong signal

Safari 27.0 ships an MCP server, so a coding agent can drive the browser itself

WebKit published the feature list on September 17, 2026, and it is the longest the team has written: 83 features, up from 58 at the first beta in June, and 844 quality fixes against the 525 announced at WWDC. The headline for anyone who builds with a coding agent is the Safari MCP server, which hands the agent the DOM, network requests, screenshots and console output from a real Safari window. Customizable Select turns the real select element into something you can fully restyle, and scroll anchoring stops the page from jumping when content loads in above what you are reading.

WebKit Blogverified

WEBKIT252eleven new features in the preview build
Webmedium signal

Safari Technology Preview 252 adds named-feature() and lets SVG reach a filter in another file

The preview build came out on September 11, 2026 and covers WebKit changes between 319252@main and 320112@main. Eleven features are new, and two of them extend the same job: how a stylesheet, and then a script, finds out what the engine underneath can do. The named-feature() function asks about a behavior that has no syntax of its own, and the registry behind it holds exactly two entries today. SVG also gained external resources, so the url() reference can finally point at a filter, mask or gradient stored in another document.

WebKitverified

INTEROP 2027Sept 23twenty days to file a proposal
Webmedium signal

Interop 2027 proposals close on September 23, and untested ideas do not qualify

The call for Interop 2027 Focus Area proposals opened on September 3, 2026 and closes on September 23, 2026. Proposals are filed as issues on the web-platform-tests/interop repository, and two conditions decide almost everything: the technology must already have a mature standard, and it must be testable, because the test results are what the dashboard scores. Anything that fails the second condition is steered toward an Interop Investigation instead. Twenty days is the whole window, and the evidence a good proposal needs takes longer than an evening to assemble.

WebKitverified

Webmedium signal

Safari 27 fixes top-level await, after WebKit rewrote the module loader in C++

WebKit published the fix on September 2, 2026. Dynamic imports of a module that uses top-level await could complete out of order in Safari, and an importer that ran early hit an error about accessing a value before initialization. The cause was a module loader built on the abandoned WHATWG Loader proposal rather than on the algorithms in the ECMAScript standard. WebKit rewrote the loader from self-hosted JavaScript into native C++, and the result ships in Safari 27 and in Safari Technology Preview 251.

WebKitverified

Webstrong signal

Chrome 152 lets a page name the hosts it is allowed to call

The release reached the stable channel on August 25, 2026 with a response header in which a server lists the endpoints its document and workers may reach. Chrome checks each destination against that list before it opens a connection. The same release brings relative alpha colors in CSS, CSSPseudoElement for three more pseudo-elements, and the autocorrect attribute reflected on HTMLElement. Two things leave: the Private Aggregation API is removed, and client-side XSLT enters a deprecation trial.

Chrome for Developersverified

Agentsstrong signal

Anthropic previews a standard that lets agents drive laboratory hardware

The Model Hardware Standard gives an agent one driver format for microscopes, liquid handlers and robotic arms, cutting integration work that used to take weeks down to hours or minutes. It is model-agnostic and reachable over the Model Context Protocol, but for now it is open only to selected labs and manufacturers, by application.

Anthropicverified

Webmedium signal

Safari Technology Preview 251 adds corner-shape, and the first way to feature-detect an at-rule

Twelve new CSS features and eleven JavaScript ones landed in the preview build on August 26. The one that changes how you write CSS is not the rounded-corner property everyone will notice, but at-rule() inside supports, which lets a stylesheet ask whether an at-rule exists before relying on it. Until now there was no way to do that. This is a preview build, so nothing here is shippable, and none of it moves Baseline.

WebKitverified

Webmedium signal

A class prefix selector is now spec text in Selectors Level 5

The draft of August 18 adds section 2.1, Class Prefix Selectors, defining .foo-* to match any class beginning with that prefix. It replaces the attribute-selector workarounds every design system carries. Nothing implements it yet, and the matching rule has an edge that will catch people: .foo-* does not match foo--bar.

CSS Working Groupverified

Webmedium signal

Put Baseline in CI so the browser stops deciding for you

Three packages and about 20 minutes. One config tells your build which browsers you target, a linter warns when a stylesheet reaches past that line, and CI says it on the pull request instead of a user saying it in a bug report six weeks later.

web.dev, npmverified

Agentsmedium signal

The claim that MCP reached a release candidate is not confirmed by the primary source

This item was built on secondhand reports from August. Checking the specification shows that Model Context Protocol has no release candidate stage at all: versions carry dates, revisions are marked draft, current or final, and the current one is 2026-07-28. What holds is the rest of it, that MCP is the layer everything an agent touches passes through and gets approved by.

agregatori vijestiverified