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May 2025: Customize RUM Alerts, Simplify Web Vitals Check

· 2 min read

More alerting options, improved design, and new Lighthouse insights audits.

Customize RUM alerts​

You can now set custom alert thresholds for real user monitoring data.

RUM alerts config UI

Design updates​

We've tidied up our application to make it easier to find the most important information. In particular, the Web Vitals tab has a new structure separating the overall Core Web Vitals assessment from metric-specific debug data.

Core Web Vitals assessment data

Lighthouse upgrade​

We've upgraded Lighthouse to version 12.6.0, which includes the Lighthouse performance insights audits!

Lighthouse insights audits

New free tool: view HAR file request waterfalls​

HTTP Archive files record what resources a browser loads when loading a website. Our new free HAR file analyzer lets you visualize HAR files using the DebugBear request waterfall.

HAR File Analyzer

New video: how to improve website performance​

We've published a Youtube video explaining how to improve website performance by identifying and fixing common page speed issues.

Video: how to improve website performance

New on the blog:​

Get a monthly email with page speed tips