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Year 2025

1,335 articles published in 2025.

Security — Cloudflare outage on December 5, 2025

Cloudflare outage on December 5, 2025

Cloudflare experienced a significant traffic outage on December 5, 2025, starting approximately at 8:47 UTC. The incident lasted approximately 25 minutes before resolution. We are sorry for the impact that it caused to our customers and the Internet. The incident was not caused by an attack and was due to configuration changes being applied to attempt to mitigate a recent industry-wide vulnerabili

DKDane KnechtDane Knecht·December 5, 2025Security
Engineering — Quick Hit #66

Quick Hit #66

@heyo53 asks on Bluesky: Is it okay to style or hide scrollbars?

DSDaniel SchwarzDaniel Schwarz·December 5, 2025Engineering
Engineering — Getting Creative With “The Measure”

Getting Creative With “The Measure”

A good measure makes reading text comfortable, while a bad one makes it more difficult. So, rather than allowing layout to dictate the measure, doesn’t it make more sense for the measure to inform layout decisions?

ACAndy ClarkeAndy Clarke·December 4, 2025Engineering
Frontend — Quick Hit #65

Quick Hit #65

Firefox Nightly adds CSS anchor positioning support, which you can learn a lot more about in our complete guide.

GGGeoff GrahamGeoff Graham·December 3, 2025Frontend
Systems — Quick Hit #64

Quick Hit #64

Chrome 143 has introduced anchored fallback container queries to help us query the currently applied fallback position of anchored elements.

DSDaniel SchwarzDaniel Schwarz·December 3, 2025Systems
Engineering — Why Replicate is joining Cloudflare

Why Replicate is joining Cloudflare

Today, we’re excited to announce that Replicate is officially part of Cloudflare. We wanted to share a bit about our journey and why we made this decision.

AJAndreas Jansson, Ben FirshmanAndreas Jansson, Ben Firshman·December 1, 2025Engineering
Frontend — Quick Hit #63

Quick Hit #63

Black Friday might be over but you can still save big on any of Piccalilli's CSS, JavaScript, or UX courses until December 9th, 2025.

DSDaniel SchwarzDaniel Schwarz·December 1, 2025Frontend
Security — Streamlining Security Investigations with Agents

Streamlining Security Investigations with Agents

Slack’s Security Engineering team is responsible for protecting Slack’s core infrastructure and services. Our security event ingestion pipeline handles billions of events per day from a diverse array of data sources. Reviewing alerts produced by our security detection system is our primary responsibility during on-call shifts. We’re going to show you how we’re using AI…

DMDominic Marks·December 1, 2025Security
Frontend — Brand New Layouts with CSS Subgrid

Brand New Layouts with CSS Subgrid

Subgrid allows us to extend a grid template down through the DOM tree, so that deeply-nested elements can participate in the same grid layout. At first glance, I thought this would be a helpful convenience, but it turns out that it’s so much more. Subgrid unlocks exciting new layout possibilities, stuff we couldn’t do until now. ✨

JWJosh W. Comeau·November 25, 2025Frontend
SRE & Ops — Get better visibility for the WAF with payload logging

Get better visibility for the WAF with payload logging

The WAF provides ways for our customers to gain insight into why it takes certain actions. The more granular and precise the insight, the more reproducible and understandable it is. Revamped payload logging is one such method.

PPaschalPaschal·November 24, 2025SRE & Ops
Languages — Does Dioxus spark joy?

Does Dioxus spark joy?

Note: this article is adapted from a presentation I gave at a Rust Paris Meetup — that’s why it sounds a little different than usual. Enjoy! Good evening! Tonight, I will attempt to answer the question: Does Dioxus spark joy? Or at the very least, whimsy. What’s Dioxus, you ask? It is first and foremost a name that is quote: “legally not inspired by any Pokémon”. Even if the author concedes in a H

AWAmos WengerAmos Wenger·November 22, 2025Languages
SRE & Ops — Zoomer: Powering AI Performance at Meta’s Scale Through Intelligent Debugging and Optimization

Zoomer: Powering AI Performance at Meta’s Scale Through Intelligent Debugging and Optimization

We’re introducing Zoomer, Meta’s comprehensive, automated debugging and optimization platform for AI. Zoomer works across all of our training and inference workloads at Meta and provides deep performance insights that enable energy savings, workflow acceleration, and efficiency gains in our AI infrastructure. Zoomer has delivered training time reductions, and significant QPS improvements, making i

CWChris Wiltz·November 21, 2025SRE & Ops
Engineering — Self-driving infrastructure

Self-driving infrastructure

At Vercel, we’re building self-driving infrastructure, a system that autonomously manages production operations, improves application code using real-world insights, and learns from the unpredictable nature of production itself.

VVercel·November 21, 2025Engineering
Security — Key Transparency Comes to Messenger

Key Transparency Comes to Messenger

We’re excited to share another advancement in the security of your conversations on Messenger: the launch of key transparency verification for end-to-end encrypted chats. This new feature enables an additional level of assurance that only you — and the people you’re communicating with — can see or listen to what is sent, and that no […]

CWChris Wiltz·November 20, 2025Security