The 202509 dataset is live

[Barry Pollard]

Hi CrUX users,

This is your monthly announcement that the latest dataset has been published to BigQuery.

The 202509 (September 2025) dataset is now available and it covers 18,640,549 origins, an increase of 1.7% over last month.

Here's a look at origins' Core Web Vitals performance this month:

• 66.8% of origins (↑ 0.5%) had good LCP

• 80.1% of origins (~ 0.0%) had good CLS

• 86.0% of origins (↑ 0.3%) had good INP

• 53.7% of origins (↑ 0.5%) had good LCP, CLS and INP

A reminder that we are deprecating the CrUX Dashboard at the end of November. This month will be the last month we are planning on updating the data in the CrUX Connector that powers this dashboard and any similar dashboards you may have created based on this.

Community shout outs this month go to:

• Dave Smart who created a CrUX MCP server (heads up, that we were already looking to add this to Chrome DevTools MCP server so keep an eye out for that in the near future!).

• We want to congratulate Firefox for shipping the Event Timing API in Firefox 144, meaning both INP (which is calculated from Event Timing) and LCP (that they shipped previously) can be measured in that browser. More Core Web Vitals for all! We hope to see these two Core Web Vitals become supported across all browsers as part of Interop 2025.

Cheers,

Barry