Jecelyn Yeen
Sofia Emelianova
What's new in DevTools
A list of everything that has been covered in the What's new in DevTools series.
- DevTools MCP server updates
- Improved trace sharing
- Support for @starting-style
- Editor widget for display: masonry
- Lighthouse 13
- Code suggestions from Gemini
- Enhancements for the DevTools MCP server
- Quicker access to AI assistance
- Debug the full performance trace with Gemini
- Toggle drawer orientation
- Google Developer Program
- Miscellaneous highlights
- Chrome DevTools (MCP) for your AI agent
- Debug the network dependency tree with Gemini
- Export your chats with Gemini
- Persisted track configuration in the Performance panel
- Filter IP protected network requests
- Elements > Layout tab adds masonry layout support
- Lighthouse 12.8.2
- Miscellaneous highlights
- Debug more insights with Gemini
- Emulate the 'Save-Data' header in 'Network conditions'
- See the Baseline status in a CSS property tooltip
- Override form factors in user agent client hints
- Lighthouse 12.8.0
- Miscellaneous highlights
- A more reliable and productive Chrome DevTools
- Upload images in AI assistance for styling
- Add request headers to the table in Network
- Check out the highlights from Google I/O 2025
- Miscellaneous highlights
- Performance panel improvements
- Preconnected origins in 'Network dependency tree' insight
- Server response and redirection times in 'Document request latency' insight
- Redirects in Summary of network requests
- Reduced noise in the performance trace
- Deprecated 'Disable JavaScript samples'
- Geolocation accuracy parameter in Sensors
- Elements panel improvements
- Debug complex CSS values easier
- @function support in Elements > Styles
- Network panel improvements
- has-request-header filter
- Direct Sockets in Isolated Web Apps
- Miscellaneous highlights
- Accessibility
- Google I/O 2025 edition
- Modify and save CSS changes to your workspace with Gemini
- Connect a workspace folder and save changes back to your source files
- Ask Gemini about performance insights
- Annotate performance findings with Gemini
- Add screenshots to your chats with Gemini
- New insights in the Performance panel
- Duplicated JavaScript
- Legacy JavaScript
- Speculations now support rule tags
- Lighthouse 12.6.0
- Miscellaneous highlights
- Accessibility
- Performance panel improvements
- New performance insights
- Click to highlight
- Server timings in Summary of network requests
- Filter cookies in 'Privacy and security'
- Sizes in kB units in tables across panels
- Autocomplete supports corner-shape and corner-*-shape in Elements > Styles
- Experimental: Highlighting issues with elements and attributes in DOM
- Lighthouse 12.5.0
- Miscellaneous highlights
- Performance panel improvements
- Origin and script links for profile and function calls in Performance
- LCP by phase field data support
- Network dependency tree insight
- Duration instead of total and self time in Summary
- Heaviest stack highlighting
- Improved empty states for various panels
- Accessibility tree view in Elements
- Lighthouse 12.4.0
- Miscellaneous highlights
- Privacy and security panel
- Performance panel improvements
- Calibrated CPU throttling presets
- Select different performance events in the same AI chat
- First- and third-party highlighting in Performance
- Field data in marker tooltips and insights
- Forced reflow insight
- 'Optimize DOM size' insight
- Extend the performance trace with console.timeStamp
- Elements panel improvements
- Real-time values of animated styles
- Support for :open pseudo-class and various pseudo-elements
- Copy all console messages
- Byte units in the Memory panel
- Miscellaneous highlights
- Persistent AI chat history
- Performance panel improvements
- Image delivery insight
- Classic and modern keyboard navigation
- Ignore irrelevant scripts in the flame chart
- Timeline marker and range highlighting on hover
- Recommended throttling settings
- Timings markers in an overlay
- Stack traces of JS calls in Summary
- Badge settings moved to menu in Elements
- New 'What's new' panel
- Lighthouse 12.3.0
- Miscellaneous highlights
- Debug network requests, source files, and performance traces with Gemini
- View AI chat history
- Manage extension storage in Application > Storage
- Performance improvements
- Interaction phases in live metrics
- Render blocking information in the Summary tab
- Support for scheduler.postTask events and their initiator arrows
- Animations panel and Elements > Styles tab improvements
- Jump from Elements > Styles to Animations
- Real-time updates in Computed tab
- Compute pressure emulation in Sensors
- JS objects with the same name grouped by source in the Memory panel
- A new look for settings
- Performance insights panel is deprecated and removed from DevTools
- Miscellaneous highlights
- Debug CSS with Gemini
- Control AI features in a dedicated settings tab
- Performance panel improvements
- Annotate and share performance findings
- Get performance insights right in the Performance panel
- Spot excessive layout shifts easier
- Spot the non-composited animations
- Hardware concurrency moves to Sensors
- Ignore anonymous scripts and focus on your code in stack traces
- Elements > Styles: Support for sideways-* writing modes for grid overlays and CSS-wide keywords
- Lighthouse audits for non-HTTP pages in timespan and snapshot modes
- Accessibility improvements
- Miscellaneous highlights
- Network panel improvements
- Network filters reimagined
- HAR exports now exclude sensitive data by default
- Elements panel improvements
- Autocomplete values for text-emphasis-* properties
- Scroll overflows marked with a badge
- Performance panel improvements
- Recommendations in live metrics
- Navigate breadcrumbs
- Memory panel improvements
- New 'Detached elements' profile
- Improved naming of plain JS objects
- Turn off dynamic theming
- Chrome Experiment: Process sharing
- Lighthouse 12.2.1
- Miscellaneous highlights
- Recorder supports export to Puppeteer for Firefox
- Performance panel improvements
- Live metrics observations
- Search requests in the Network track
- See stack traces of performance.mark and performance.measure calls
- Use test address data in the Autofill panel
- Elements panel improvements
- Force more states for specific elements
- Elements > Styles now autocompletes more grid properties
- Lighthouse 12.2.0
- Miscellaneous highlights
- Console insights by Gemini are going live in most European countries
- Performance panel updates
- Enhanced Network track
- Customize performance data with extensibility API
- Details in the Timings track
- Copy all listed requests in the Network panel
- Faster heap snapshots with named HTML tags and less clutter
- Open Animations panel to capture animations and edit @keyframes live
- Lighthouse 12.1.0
- Accessibility improvements
- Miscellaneous highlights
- Inspect CSS anchor positioning in the Elements panel
- Sources panel improvements
- Enhanced 'Never Pause Here'
- New scroll snap event listeners
- Network panel improvements
- Updated network throttling presets
- Service worker information in custom fields of the HAR format
- Send and receive WebSocket events in the Performance panel
- Miscellaneous highlights
- Performance panel improvements
- Move and hide tracks with updated track configuration mode
- Ignore scripts in the flame chart
- Throttle down the CPU by 20 times
- Performance insights panel will be deprecated
- Find excessive memory usage with new filters in heap snapshots
- Inspect storage buckets in Application > Storage
- Disable self-XSS warnings with a command-line flag
- Lighthouse 12.0.0
- Miscellaneous highlights
- Understand errors and warnings in the Console better with Gemini
- @position-try rules support in Elements > Styles
- Sources panel improvements
- Configure automatic pretty-printing and bracket closing
- Handled rejected promises are recognized as caught
- Error causes in the Console
- Network panel improvements
- Inspect Early Hints headers
- Hide the Waterfall column
- Performance panel improvements
- Capture CSS selector statistics
- Change order and hide tracks
- Ignore retainers in the Memory panel
- Lighthouse 11.7.1
- Miscellaneous highlights
- New Autofill panel
- Enhanced network throttling for WebRTC
- Scroll-driven animations support in the Animations panel
- Improved CSS nesting support in Elements > Styles
- Enhanced Performance panel
- Hide functions and their children in the flame chart
- Arrows from selected initiators to events they initiated
- Lighthouse 11.6.0
- Tooltips for special categories in Memory > Heap snapshots
- Application > Storage updates
- Bytes used for shared storage
- Web SQL is fully deprecated
- Coverage panel improvements