Imagine hating on us when we're literally just minding our own business and browsing the web 🙃

Sometimes, a server is just a teapot! 🫖 Really? 😂 Created as an April Fools' joke in 1998, it’s simply a playful nod. HTTP Status Code 418, aka "I'm a teapot," is one of the quirkiest status codes in the HTTP spec. Read more on MDN 👇 developer.mozilla.org/en-US/docs/Web…

Firefox 136 Beta 1 shipped today. It contains patches from >1615 tickets fixed during the nightly cycle.

Are you still not using JavaScript Sets? Discover ↓ ✨ set.union() ✨ set.intersection() ✨ set.difference() See how sets might make your data efficient. Dive in! 👇 developer.mozilla.org/en-US/blog/jav…

Interop 2025 continues the mission to make the web more consistent across browsers, building on 2024’s 95% score. 🙌 This year, 19 focus areas target key developer needs and long-standing issues, including WebRTC, Storage Access API, and CSS Zoom. hacks.mozilla.org/2025/02/intero…

Firefox 136 Beta 7 is out with 10 bug fixes bugzilla.mozilla.org/buglist.cgi?bu…

What you probably know: ✅ 200 OK 🔀 301 Moved Permanently ⚠️ 404 Not Found ⛔ 500 Internal Server Error What you might not: 🫖 418 I'm a teapot 💾 206 Partial Content 🔓 451 Unavailable for Legal Reasons Get a deep dive into status codes ↓ developer.mozilla.org/en-US/docs/Web…

You can now switch to vertical tabs from your tabs context menu

ICYMI ⚠️ JavaScipt date object has been tricky for years, and it's changing soon. The NEW Temporal API brings, 🌍 Easily handle time zones 📆 Precise date math 🕒 Parse ISO strings without errors ⌛ Durations, date ranges, and more. Start exploring 👇 developer.mozilla.org/en-US/blog/jav…

Are you still not using JavaScript Sets? Discover ↓ ✨ set.union() ✨ set.intersection() ✨ set.difference() See how sets might make your data efficient. Dive in! 👇 developer.mozilla.org/en-US/blog/jav…

[Nightly Blog] Turn Tabs To Their Side – These Weeks in Firefox: Issue 177 blog.nightly.mozilla.org/2025/03/11/tur…

📈 We’ve done over 47 million scans and insights into 6.5 million websites. MDN Observatory is your go-to for the latest security trends and guidelines. Stay ahead of threats with the analysis! Check your site now 👇 developer.mozilla.org/en-US/observat…

Do you test? You should. 🧪 MDN's testing curriculum covers key testing techniques like unit testing, integration testing, and functional testing, giving you the skills to build and maintain error-free applications. Start with fundamentals 👇 developer.mozilla.org/en-US/curricul…