Chrome Developers Blog

Lighthouse adds an Agentic browsing category (M150+) with deterministic audits for accessibility, stability, and WebMCP integration. Chrome DevTools for Agents provides a testing persona to simulate agent interaction, invoke Lighthouse audits, and debug machine-readable signals.

Chrome DevTools for agents v0.25.0 introduces a Discovery API that lets frameworks expose runtime tools to AI agents via an event-based JavaScript API and MCP integration. Angular provides Signal Graph and DI Graph tools; React is experimenting.

Immediates (push constants) let you pass small, frequently changing data directly to shaders without GPU buffer or bind group overhead, using the new address space in WGSL and setImmediates() in JavaScript. Stricter validation rules prevent misuse of the TRANSIENT_ATTACHMENT usage flag.

Chrome Developers Blog announces an origin trial for WebMCP, a new API that allows structured tools for agents to complete tasks efficiently in web applications.

Chrome 150 beta introduces AccentColor and AccentColorText system colors for accessing device accent colors in installed web applications, animatable CSS zoom property, and a new CSS text-fit property that scales font size to fit container width. Also adds polygon() corner-rounding, CSS URL request modifiers, background-clip border-area support, light-dark() with image values, comma-separated container queries, focusgroup attribute for arrow-key navigation, media element pseudo-classes, popover=hint behavior improvements, and dozens of other CSS and Web API enhancements across multiple specifications.

Chrome 150 introduces PWA Origin Migration, allowing installed Progressive Web Apps to transition to a new same-site origin via a user update dialog. Developers configure the migration with a migrate_from field in the new app's manifest and an allow_migration entry in the old origin's /.well-known/web-app-origin-association file, with optional behavior controls (suggest or force) and proactive signaling via migrate_to or redirects.

Chrome DevTools for agents MCP server and CLI are now stable, with new custom third-party tools and WebMCP debugging support. Experimental WebMCP debugging tools are available in the Application panel for inspecting and executing tools. CSS code completion with Gemini now works in the Styles tab. AI assistance received a major UI overhaul with agent walkthroughs, widget rendering, and conversation export to coding agents, plus improved responses using Gemini 3. APCA color contrast guidelines graduated from experimental to stable preference.

CSS gap decorations let you style gaps in container layouts like grid and flexbox with new properties like column-rule-inset and row-rule-visibility-items. Active WebSocket connections no longer prevent pages from entering the Back/Forward Cache, allowing instant restoration when users navigate back. Also adds Intl.Locale.prototype.variants for Unicode locale variant handling.

Chrome now includes built-in AI features that developers can use to build new capabilities into their applications.

Google published a recap of Chrome extensions announcements and updates from I/O 2026.

New guide covers modernizing authentication with passkeys, digital credentials, and related approaches, based on the Google I/O 2026 session.

All talks from Google I/O 2026 are now available on demand.

New out-of-order streaming capabilities and renewed HTML insertion and streaming methods are available for testing in Chrome 148.

Chrome DevTools for agents provides visibility for AI coding agents to verify, debug, and optimize code in real time.

Google I/O 2026 announcements for Chrome include a new agents framework for building autonomous web applications, improvements to Chrome DevTools for developer workflow, and accessibility features for web content. Full details of all 15 updates are available in the blog post.

Chrome is launching an origin trial for the HTML-in-Canvas API, which enables developers to bring DOM elements into Canvas-driven applications.

Chrome 149 introduces CSS gap decorations, a new way to style gaps in flexbox and grid layouts. This feature is also available in Edge 149.

Chrome is testing a proposed HTML install element that enables web app installation. The feature is available as an origin trial.

Chrome 148 adds Immediate UI mode for passkeys and passwords, streamlining credential requests by skipping the initial UI prompt and presenting available credentials directly.

Published: May 6, 2026