DebugBear
@debugbear.com
Learn about page speed, measure your website performance, and monitor Core Web Vitals metrics over time. https://www.debugbear.com/
You can now add uptime monitors on DebugBear! This feature is still in beta and we welcome your feedback! www.debugbear.com/uptime-monit...
Website Uptime Monitoring
Continuously monitor your website's uptime and response speed. Get alerted the moment your site goes down.
debugbear.com
Edge is experimenting with a new performance API: network efficiency guardrails let browsers report performance issues back to the server. www.debugbear.com/blog/network...
Network Efficiency Guardrails: Detect Web Performance Issues | DebugBear
Learn how to detect hidden network performance problems before they impact your users. This guide explains Microsoft's new Network Efficiency Guardrails, how they use Document Policy and the…
debugbear.com
This month we launched a new free website testing tool, added new data export options, and improved our comparison UI. www.debugbear.com/changelog/ju...
July 2026: New bottleneck finder tool and better data export | DebugBear
Introducing our new bottleneck finder tool, individual chart exports for custom dashboards, improved comparison data, bulk region editing, and HAR waterfall exports.
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Want to access your page speed data with Claude Code? We've just published a guide on how to connect Claude Code to our MCP server. www.debugbear.com/docs/claude-...
Test page speed with Claude Code | DebugBear
How to setup the DebugBear MCP server with Claude Code.
debugbear.com
Our bottleneck finder can detect render-blocking requests that Chrome doesn't report. We explain how it works in our latest blog post. www.debugbear.com/blog/website...
Find Hidden Render-Blocking Requests with the Website Bottleneck Finder | DebugBear
Chrome's render-blocking label doesn't always fully illustrate which resources are impacting a page's First Contentful Paint (FCP), Largest Contentful Paint (LCP) or H1-visible metrics. We recently…
debugbear.com
🤖 New video: use our MCP server to set up your page speed tests and analyze your data! www.youtube.com/watch?v=V8sw...
How to setup and use the DebugBear MCP Server
In this video, we will take a look at how to setup the DebugBear MCP Server with Claude. DebugBear MCP server guide: https://www.debugbear.com/docs/mcp 0:00 - Intro 0:38 - Setup with Claude 1:30 -…
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Not sure why your website is rendering slowly? Our new website bottleneck finder identifies what resources key page content depends on. Test your website for free! www.debugbear.com/website-bott...
Website Bottleneck Finder
Find which network resources slow down page rendering. Check if your page depends on specific scripts or data.
debugbear.com
New you can now update test regions for your monitored pages in bulk. www.debugbear.com/docs/bulk-edit
How can you use Lighthouse to check if your website follows best practices? Our new article explains how to test your website and goes through the checks that Lighthouse performs. www.debugbear.com/blog/lightho...
Implement Website Best Practices With Lighthouse | DebugBear
A guide to every audit in Lighthouse's Best Practices category and how to fix failures in order to reach a score of 100.
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You can now easily duplicate your custom web performance dashboards. Just hover over the dashboard in the list and click the copy icon.
You can now add histograms and scatter plots to your custom dashboards! www.debugbear.com/docs/dashboa...
Build Custom Web Performance Dashboards | DebugBear
Create custom dashboards that combine Lab, CrUX, and RUM data in one place for detailed comparisons and reporting.
debugbear.com
Train wifi suspiciously close to the Lighthouse mobile device configuration 😅
Our MCP server now works with the Cursor desktop app! Learn how to connect your web performance data in cursor here: www.debugbear.com/docs/cursor-...
How to view web performance data in Cursor | DebugBear
Connect Cursor to DebugBear with the Model Context Protocol so you can run page speed tests, query metrics, and manage projects from Cursor's agent.
debugbear.com
We just published a new blog post benchmarking page speed for train booking websites in Europe! We also looked at the technical factors that drive the results, and how these websites could be optimized. www.debugbear.com/blog/which-e...
What's The Fastest Train Booking Website In Europe? | DebugBear
An analysis of 25 European train websites to discover which website performs best across the Core Web Vitals.
debugbear.com
New video: learn how to scan your website for issues with Core Web Vitals and other quality issues. www.youtube.com/watch?v=Hy23...
How to scan your website for performance and quality issues
Learn how to check your entire website for problems across page speed, accessibility, SEO, and agentic browsing. 00:00 Introduction 00:13 How run run a website scan 00:30 Retrieving CrUX…
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We've added an MCP server! You can now access your performance data with your AI agent, trigger tests, and add projects or timeline annotations. www.debugbear.com/docs/mcp
Access Web Performance Data With The DebugBear MCP Server | DebugBear
Connect AI assistants like Claude and ChatGPT to DebugBear using the Model Context Protocol (MCP) to run tests, query metrics, and manage projects.
debugbear.com
Last month we added support for the new Lighthouse agentic browsing audits, one-off page speed tests, and filters that apply to your entire custom dashboard. www.debugbear.com/changelog/ma...
May 2026: Agentic Browsing Audits + Quick Performance Tests | DebugBear
A new Lighthouse category for agentic browsing, quick tests for one off analysis, AI agent prompts, custom DNS mappings, and dashboard filters.
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Need your website to stay fast long-term? We've published a detailed guide to detecting performance regressions, notifying your team, and debugging issues. www.debugbear.com/blog/web-per...
How To Set Up Performance Alerts On Your Website | DebugBear
Learn how to set up performance budgets to monitor Core Web Vitals and other key metrics such as Time To First Byte and First Contentful Paint.
debugbear.com
Differences in URL query parameters can cause cache misses in the browser or on Content Delivery Networks. The new No-Vary-Search HTTP header fixes this problem. www.debugbear.com/blog/no-vary...
Smarter Website Caching With No-Vary-Search | DebugBear
Learn how No-Vary-Search improves caching for URLs with query parameters. This article explains how the header works, when it increases cache efficiency, and when to avoid it.
debugbear.com
Want to run one-off page speed tests without setting up monitoring? Our new quick tests feature makes that easy, through the app or via our API. www.debugbear.com/docs/quick-t...
Quick Tests | DebugBear
Run one-off page speed tests against any URL without adding the page to your monitoring dashboard.
debugbear.com
Ticket sales are open! perfnow.nl/tickets.html
performance.now(); 19th and 20th of November 2026, Amsterdam
On 19th and 20th of November 2026, the seventh edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.
perfnow.nl
Google announced the new Lighthouse agentic browsing category at Google I/O yesterday! It validates WebMCP integrations, LLMs.txt files, and if the accessibility tree is readable, ... Test your own website here: www.debugbear.com/test/website...
Free Website Grader: Check Website Quality
Check your pages for issues with performance, SEO, accessibility, and agentic browsing. Get a free report with tips to improve your website.
debugbear.com
Want to test performance on a staging site or route traffic through a CDN? DebugBear now lets you DNS override to route domains to specified IP addresses. www.debugbear.com/docs/dns-ove...
Override DNS Settings In Synthetic Tests | DebugBear
Resolve a hostname to a specific IP address during a test, so you can hit a staging server or bypass a CDN to reach your origin directly.
debugbear.com
There's a new category in Google's Lighthouse report: Agentic Browsing! www.debugbear.com/blog/lightho...
Google Lighthouse Has A New Agentic Browsing Category | DebugBear
Lighthouse 13.3 introduces a new Agentic Browsing category that audits how well your website works with AI agents.
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DebugBear lets you set up custom web performance alerts and send them out by email, in Slack, or Microsoft Teams. Learn how to set this up: www.debugbear.com/docs/website...
Set up web performance monitoring alerts | DebugBear
Set up alerts to get notified about performance regressions and stay on top of your team's web performance efforts.
debugbear.com
New this month: custom dashboards, better alert configuration, and an updated UI for adding chart annotations. www.debugbear.com/changelog/ap...
April 2026: Custom Performance Dashboards | DebugBear
Custom dashboards are now available, along with Lighthouse and Chrome upgrades and a new CLS tool.
debugbear.com
What's the fastest government services website? We ran tests for 25 countries to find out! www.debugbear.com/blog/which-g...
Which Country Has The Fastest Government Website? | DebugBear
An analysis of 25 government websites to discover which website has the fastest Largest Contentful Paint (LCP) and upholds modern web standards.
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You can now create fully custom performance dashboards in DebugBear! Display the metrics that matter most to your team, and combine RUM, CrUX, and synthetic metrics all in one place. youtu.be/96fFkixiC8Y
How to create custom web performance dashboards for your team
Learn how to set up custom page speed and Core Web Vitals dashboards for your team. Combine synthetic metrics, Google CrUX data, and real user monitoring data in one place. Try DebugBear:…
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📣 I'm delighted to welcome a new partner to @pixelpioneers.co: Meet @debugbear.com! 🙌 Founder Matt Zeunert will present a lightning talk on web performance metrics at the conference in Bristol on 19 June. 👉🏼 Read the full talk description and get your tickets: pixelpioneers.co/events/brist...
Check out the comprehensive guide to technical SEO we published this week! It covers everything from crawling, to indexing, and AI engines. www.debugbear.com/blog/technic...
Technical SEO Checklist: The Complete Guide For 2026 | DebugBear
A comprehensive technical SEO checklist for 2026 covering crawling, indexing, Core Web Vitals, JavaScript rendering, security, and visibility in AI-powered search engines.
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