Mobile+Web Developer Trainer, Author, Speaker and Journalist Numismatics Hobbist 13 books authored. Latest, free Learn PWA! published by Google Topics: Mobile Apps, PWA, AI, Web Performance, JavaScript, Go Website: firt.devhttps://bsky.app/profile/firt.devhttps://bsky.app/profile/firt.dev/post/3msvbi3vkec22Next month, I’ll be speaking at dotJS in Paris 🇫🇷 about **client-side AI on the Web**—running AI directly in the browser and what that enables for web developers. If you’re planning to attend, you can get **20% off your ticket** using the code **SPEAKER20**: www.dotjs.io See you in Paris!12 Aug 2026 13:49 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3msvbi3vkec22https://bsky.app/profile/firt.dev/post/3mfmir5jbf227🔥 45% OFF What if you didn’t need that framework? My new book “Vanilla Web” is @manning.com Deal of the Day. Modern standards. Fewer dependencies. More control. And a smaller, cleaner surface that works better with AI agents. Early access edition 👇 https://www.manning.com/dotd?utm_campaign=9793804-Deal%20of%20the%20Day&utm_source=Author%20DOTD%20emails24 Feb 2026 15:38 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3mfmir5jbf227https://bsky.app/profile/firt.dev/post/3mczwmerwuc2f🔴 NEW BOOK 🔴 I’m writing a new book and the early access version (MEAP) is already available with @manning.com. 👉 50% off for a limited time Includes continuous updates and the final version (print or ebook). This is my 15th book 🙂 Link: hubs.la/Q03_tWSb0 https://hubs.la/Q03_tVmy022 Jan 2026 19:35 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3mczwmerwuc2fhttps://bsky.app/profile/firt.dev/post/3m6fugpul7c23I sent my first Internet email 30 years ago 🙀 Fun detail: my email address wasn't even a real personal inbox. It was more like an omnibus address that looked like: firt%my-BBS@international-provider.com So yes, I was already using firt as my username back then. 😅24 Nov 2025 22:22 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3m6fugpul7c23https://bsky.app/profile/firt.dev/post/3m3fs5tissc22Attending #WebAI Summit in Sunnyvale 🇺🇸 today17 Oct 2025 17:26 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3m3fs5tissc22https://bsky.app/profile/firt.dev/post/3m2jm6zfhq22k🇺🇸Next week, I'll be traveling to San Francisco and the Bay Area. By the end of the week, I'll be attending the Web AI Summit by Google in Sunnyvale. I hope to meet some of you there! 😀06 Oct 2025 12:24 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3m2jm6zfhq22khttps://bsky.app/profile/firt.dev/post/3lzqkapr7hc2fI'm at a tech event in Argentina, and several people have mentioned the same feeling: AIOverflowException. There is almost no space these days for topics other than AI.26 Sep 2025 13:13 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lzqkapr7hc2fhttps://bsky.app/profile/firt.dev/post/3lz2gj23wfk2qMeta's big reveal today: smart glasses with a display and a wristband for gesture control. Cool. I'm now wearing my Google Glass (2013) + Myo armband (2014). Same thing! minus the AI 😂17 Sep 2025 18:08 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lz2gj23wfk2qhttps://bsky.app/profile/firt.dev/post/3lz2dyeaj4c2kI’ve tested a couple of agentic browsers recently. They were too slow and failed at very basic tasks, like saving a calendar appointment, running a simple search, or filling out a web form from a JSON record. Right now, they’re still just a promise of a possible future.17 Sep 2025 17:22 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lz2dyeaj4c2khttps://bsky.app/profile/firt.dev/post/3lz2d35wfu22kChapter 4 is ready ✅ I'm working on my next technical book. Physical printed book. Also, as an ebook. With a well-known IT publisher, as if it's 2015 all over again. 😃17 Sep 2025 17:06 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lz2d35wfu22khttps://bsky.app/profile/firt.dev/post/3ltu7tux43k2aFive years ago, I published an open letter denouncing Apple employees for their hostile and bullying attitude toward developers who voiced criticism. It gained enough traction that, a few days later, Tim Cook briefly responded to it in the U.S. Congress. Letter: firt.dev/lazy13 Jul 2025 15:46 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3ltu7tux43k2ahttps://bsky.app/profile/firt.dev/post/3lrszqj6aoc2lVanilla Web power 💪 😃 [contains quote post or other embedded content]17 Jun 2025 17:34 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lrszqj6aoc2lhttps://bsky.app/profile/firt.dev/post/3lrqzpo47jk2s20 years ago in Buenos Aires, I launched Latin America’s first Mobile App Dev career. I built the full curriculum: J2ME, .NET, WAP, SMS, Symbian, Palm & more — years before iPhone or Android even existed. 😀16 Jun 2025 22:28 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lrqzpo47jk2shttps://bsky.app/profile/firt.dev/post/3lr7f5fkxv22fIt is 25% OFF! 🔥 [contains quote post or other embedded content]09 Jun 2025 22:05 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lr7f5fkxv22fhttps://bsky.app/profile/firt.dev/post/3lr7eozz2zc2p🔴ADD TO HOME SCREEN on iOS 26 and iPadOS 26 Any website is treated as an app by default (a.k.a. a PWA) if added to the home screen. "Add to home Screen" is now 3 taps away: 1️⃣ ... menu 2️⃣ Share 3️⃣ ... more (second one)09 Jun 2025 21:57 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lr7eozz2zc2phttps://bsky.app/profile/firt.dev/post/3lr7ek3kgbk2fAll #WWDC25 videos are now live! Quick fun detail: some slides mention Safari 19 instead of the final name, Safari 26 — just like when xrOS appeared instead of visionOS 😅 Here’s a thread with the six web-related sessions you can watch now 👇09 Jun 2025 21:54 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lr7ek3kgbk2fhttps://bsky.app/profile/firt.dev/post/3lr4ulfanj22cPHP is now 30 years old! 🥳 It's still alive! I've published a PHP Basics course a few months ago. firt.dev/php-course/08 Jun 2025 22:03 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lr4ulfanj22chttps://bsky.app/profile/firt.dev/post/3lqsamlvqlc2u🟡 NEW COURSE OUT! Build a high-performance full-stack app from scratch — no frameworks. Vanilla JavaScript frontend + rock-solid Go backend with a JSON API. Now on @frontendmasters.com Get 10% OFF First month at firt.dev/vanillajs-go/04 Jun 2025 16:39 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lqsamlvqlc2uhttps://bsky.app/profile/firt.dev/post/3lpcf4xf4v22pMy talk titled “Unlocking Generative AI in your Web App” was delivered last week at @devoxx.uk and is now available for viewing. Check it out! https://firt.dev/genai-web-apps/16 May 2025 15:52 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lpcf4xf4v22phttps://bsky.app/profile/firt.dev/post/3lp5ji55h4k2jThanks for a great event! [contains quote post or other embedded content]14 May 2025 17:27 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lp5ji55h4k2jhttps://bsky.app/profile/firt.dev/post/3lolcnuba722cHello London 🇬🇧. Always happy to walk around the city.07 May 2025 11:37 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lolcnuba722chttps://bsky.app/profile/firt.dev/post/3lokxsdqxsk2cDevoxx UK London starting now 🇬🇧 It's great to see hundreds of developers in one physical room in 2025. 😅 @devoxx.uk07 May 2025 08:22 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lokxsdqxsk2chttps://bsky.app/profile/firt.dev/post/3lo7lw6qq3c2sNext week, I'll be in Madrid 🇪🇸 and London 🇬🇧 to discuss on Vanilla Web App development and AI for Web Developers. See you there! 😍02 May 2025 19:51 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lo7lw6qq3c2shttps://bsky.app/profile/firt.dev/post/3lmi7wfkntk2e"The Town that Went Crazy For Crypto" Last Sunday, the printed US edition of The New York Times featured my investigation from a few months ago into a huge crypto scam involving Polish actors hired as fake executives in a small town in Argentina. It's an incredible story! Links in reply!10 Apr 2025 19:19 +0000at://did:plc:2nhrk6mx2bjua6dimrmukaav/app.bsky.feed.post/3lmi7wfkntk2e