Mozilla Developer
@mozhacks
Followers
90K
Following
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Statuses
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Official Mozilla account for people who make the web. Learn about web platform development and emerging technologies. Help: @FirefoxSupport
Global
Joined June 2009
The W3C Security Web Application Guidelines Community Group wants to understand how developers are using specific web platform security features, and what the barriers are to the adoption. Take their survey here:
docs.google.com
Thanks for taking our survey about the usage of web platform security features. We're the W3C Security Web Application Guidelines Community Group (SWAG CG), and our mission is to develop guidelines...
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Last week I posted about a secret config in Firefox that made view transitions easier to debug. @SailorPsy said we should make it less secret. So we did.
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On-chain DATs are coming to @Solana. Imagine if they could never fall below NAV. That’s Samsara. 📿 Which asset should go first? $BONK, $PENGU, $PUMP or something new? Comment below ↓
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There are… a lot of proposals, but you don't need to rank them all. Skim through the list, and find the few you really care about. This is an experiment, so we're also interested in feedback on the app itself, and things we can improve for next year.
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As an experiment, we (the Firefox team) wanted to try a new way to get feedback on which Interop proposals matter most. So, here's a web app where you can rank the proposals you care about, giving us data we can use when reviewing which ones to champion. https://t.co/pu2Ovpxd66
interop-rank.jakearchibald.com
Rank the web platform features you care most about
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Ever wish HTTP status codes were easier to remember? 🖼️ Check out this MDN cheatsheet that pairs each status code with an emoji to help you visualize what each one means, from 200 OK ✅ to 418 I’m a teapot 🫖 Check it out 👇
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The trailer is here. Season 2 of Owning Manhattan premieres December 5 on Netflix. Bigger listings. Higher stakes. Real estate doesn’t get more real than this. Let’s go. 🎥 Watch the trailer:
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Happy #DebianDay! Happy 32nd birthday to @debian, one of the oldest operating systems based on the #LinuxKernel, and the basis for #Ubuntu, #Kali, and #LinuxMint! 🐧🎈🎂 Thank you, #Debian community, for all your amazing work! @ubuntu @linuxmint @kalilinux
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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 👇 https://t.co/ROceTwa3b1
developer.mozilla.org
Explore the need for testing, and learn how to implement common test types.
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📈 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 👇 https://t.co/LgmOrn717F
developer.mozilla.org
Test your site’s HTTP headers, including CSP and HSTS, to find security problems and get actionable recommendations to make your website more secure. Test other websites to see how you compare.
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[Nightly Blog] Turn Tabs To Their Side – These Weeks in Firefox: Issue 177
blog.nightly.mozilla.org
Highlights Firefox 135 goes to release today (Feb 4th)! Lots of great changes in this release! We’ve landed Bug 1936379 - Add Sidebar and Vertical Tabs checkboxes in about:preferences ...
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Are you still not using JavaScript Sets? Discover ↓ ✨ set.union() ✨ set.intersection() ✨ set.difference() See how sets might make your data efficient. Dive in! 👇 https://t.co/Ld8ZZ4JB1o
developer.mozilla.org
New JavaScript Set methods are landing across browsers. Learn about sets, how you can use these methods to compare different sets, create new sets with specific properties, and more.
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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 👇 https://t.co/6Ezn2gQ1qV
developer.mozilla.org
A new way to handle dates and times is being added to JavaScript. Let's take a look at Temporal, what problems it solves, the current state, and what you'll find in the new documentation about it on...
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You can now switch to vertical tabs from your tabs context menu
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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 ↓ https://t.co/mn259D2ksx
developer.mozilla.org
HTTP response status codes indicate whether a specific HTTP request has been successfully completed. Responses are grouped in five classes:
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Firefox 136 Beta 7 is out with 10 bug fixes https://t.co/rehZnsOKhn
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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
Interop 2025 continues the mission to make the web more consistent across browsers, building on 2024’s 95% interoperability score.
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Are you still not using JavaScript Sets? Discover ↓ ✨ set.union() ✨ set.intersection() ✨ set.difference() See how sets might make your data efficient. Dive in! 👇 https://t.co/Ld8ZZ4JB1o
developer.mozilla.org
New JavaScript Set methods are landing across browsers. Learn about sets, how you can use these methods to compare different sets, create new sets with specific properties, and more.
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Firefox 136 Beta 1 shipped today. It contains patches from >1615 tickets fixed during the nightly cycle.
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When Bitcoin moves 2% and you start planning early retirement.
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Last but not least, you can also join the Mozilla devroom on Sunday, starting from 13:15. We’ll be at the U building (UB5.230). https://t.co/7YtWut0Wee
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Then on Sunday, @MitchellBaker will deliver a keynote on what FLOSS means in the AI world. Come to the Janson Auditorium in the J building at 9 am to join the session! https://t.co/0Lw5JvPxpm
archive.fosdem.org
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Also on Saturday, the @mozamo team will host a bird of feathers session for web extension. Join us at 11 am at AW1.121! https://t.co/6JosP5g5be
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