Maximiliano Firtman's content and learning experiences for #home

What's supported on Safari on iOS and iPadOS for Progressive Web Apps

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During dotJS 2026 in Paris 🇫🇷 I delivered this talk about running generative AI entirely on the client side

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During AI DevCon 2026 in London 🇬🇧 I delivered this talk about WebMCP and how web apps can expose tools to AI agents

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Building apps without frameworks, early access!

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1.5-hours online video training for web developers

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JSConf Mexico session (in spanish)

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Vanilla JavaScript Tutorial

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3.5-hour online video workshop for web professionals

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10-hours online video workshop for web professionals

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What happens to JS code running in a web app when you switch tasks?

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A session available in English and Spanish about the usage of the web core technologies without frameworks

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During Devoxx UK in London 🇬🇧 I delivered this talk

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Vanilla reusable components Tutorial

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A review on how Apple named different iPads over time

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A short course in Spanish on JS Promises

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Integrating AI into your development workflow

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5-hour online video workshop for web professionals

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4.5-hour online video course for web professionals

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4.5-hour online video course for web professionals on JavaScript

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4.5-hour online video course for web professionals on JavaScript

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During Wey Wey Web 2023 in Málaga 🇪🇸 I delivered this talk about ChatGPT and AI for Web Developers

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4-hour Online Course to understand basics of Python

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5-hour Online Course creating PWAs using Angular

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During Build Stuff 2023 in Vilnius 🇱🇹 I delivered this talk about Passwordless authentication using Passkeys

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5-hour online video course for web professionals on Web Performance

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8-hour online video course for web professionals on the Go language

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A quick and dirty list of platforms and distributions methods available for PWA installation

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4-hour online video course for web professionals on JavaScript APIs

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6-hour online video course for web professionals on DOM and Vanilla-JS

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2-hour online video course for web professionals on OpenAI APIs and LLMs

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Updates worth mentioning for Progressive Web Apps

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Unveiling the Potential of AI-Powered Assistance with your web content and the ChatGPT browsing plugin

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Use JavaScript for HTML interactity with this online course

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5-hour online video course for web professionals. Passwordless auth, biometrics and password-based logins.

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4-hour online video course for web professionals. IndexedDB, Cache Storage and FileSystem.

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5-hour online video workshop for web professionals

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Current state of the platform, market share and what every PWA should do

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A dirty list of viewport's widths and resolutions

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Tips and Hacks to Improve User Experience

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6-hour online video workshop for professionals

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6-hour online video workshop for professionals

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5-hour online video workshop for professionals

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iOS 15.4 beta has finally added icon support in the manifest, Web Push, AR, and VR experiments.

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4-hour online video workshop for web professionals

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A free interactive course available at web.dev

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4-hours online video workshop for web professionals

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An "inventor" claims you need to pay a license to publish a PWA because he owns a U.S. Patent

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What's new, what's missing, new challenges and new capabilities for iPhone and iPad

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Current state of the platform, market share and what every PWA should do

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Current status, market share, what's new, what's missing, new challenges and new capabilities

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2-hours online video training for PWA developers

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A research to understand what happens with our sites and PWAs when they are not visible on desktop or not active on mobile

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What's new, what's missing, new challenges and new abilities

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The journey from a browser-based PWA to the Google Play Store, App Store and Microsoft Store

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2.5-hours online video training for PWA developers

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17 years of stores' cuts with my own experience distributing mobile apps

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The PWA platform pushed the end of PhoneGap and Adobe's investment in Apache Cordova

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2-hour online video training for web designers and developers

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Open letter to the Safari team after bullying web developers

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During LuxembourgJS 2020 🇱🇺 I gave this talk updating the PWA Cheat Sheet to 2020

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During COVID-19 Pandemic, I gave this online talk for the Reactive Conference for React developers introducing the PWA platform and tips for React..

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PWA, React Native, or NativeScript. Which should you choose?

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Current status of the PWA platform

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6-hour Learning Path to start with webperf

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3-hour Online Course to understand this new web paradigm

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It’s that time again. iOS 13 has just been released with the new branded iPadOS 13 coming in a few days, and iPhone 11 variations being sold from today. So it’s time again to talk what’s new or different for Progressive Web Apps, web design and web development in general.

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When you are interested in web performance, image compression and optimization are key aspects to consider that will impact many user-centric metrics, such as First Meaningful Paint and Speed Index. I’ve researched the image optimization solutions offered by the main CDN providers in order to identify the most relevant techniques in use today to map the differences among providers and help you pick one in case you need them. I also looked at what opportunities for improvement are still there.

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kaiOS has just released its developer portal. Let's review current status of the platform.

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Online video training to start with the PWA world

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During JSConf Europe 2019, in Berlin, Germany 🇩🇪, I've delivered this session covering the latest ideas and techniques to provide a good Progressive Web App

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5-hour Online course to understand webperf APIs

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During YGLF (You Gotta Love Frontend) in Vilnius Lithuania 🇱🇹, I've delivered this session covering the latest ideas and techniques to hack web performance.

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An intro to the platform for IT & business

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Did you know that over 25 years Microsoft Browsers identified themselves differently in the User Agent? From Microsoft Internet Explorer, MSIE and Edge to the current versions Edg, EdgA and EdgiOS.

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One year after the first initial support for PWAs on iOS, Apple released iOS 12.2 for iPhone and iPads with what it seems to be the biggest step forward in the last year, addressing the two most annoying problems we’ve been dealing with PWAs: reload effect and OAuth logins.

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15-hour online video training for beginners. Learn HTML, CSS and JavaScript.

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Disclaimer: I’m not affiliated with Google Play, Chrome or any other company mentioned. This is not an official statement; usage of the logo and name is just for illustration.

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2018 was the Year of PWAs thanks to a series of news on the Web Platform, such as:

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Improving design and user experience

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–What? How can you say that? Android has the best PWA experience available today, Max!
–Android? or Chrome on Android? And… is it the best possible experience?

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During Heapcon 2018 in Belgrade, Serbia 🇷🇸, I've delivered this session covering the latest ideas and techniques to provide a good Progressive Web App

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How to unite app and web design seamlessly together.

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During Tinel Meetup in Splitz, Croatia 🇭🇷, I've delivered this session covering the latest ideas on Augmented Reality (AR) in general and on the Web

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I know I’m starting this article with a strong title. But it’s not a click-bait title, it’s my recommendation; in this post, I will explain the reason. The Chrome team released last week a new library: PWACompat (see post and GitHub repository). The library claims to “bring Web App Manifest to older browsers” but the consequences of injecting that script can lead to bad user experiences.

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Apple Watch 3+ now has a browser on mails & links on Messages

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Discover vital tips and tricks to get the most out of Progressive Web Apps.

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1-hour Online Course to work with threading in the Web

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(with silence from Apple)

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Cupertino, we have a problem

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4-hour course for iOS and Android

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5-hour Online course to start with Web Performance

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On August, 21st, 2017 after the solar eclipse, Google released the final version of Android 8 now known as Android Oreo. The sun wasn’t the only thing that was hidden for a while today, as Progressive Web Apps have acquired new problems.

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If you need to travel frequently and you are getting stressed, frustrated and anxious there are are a couple of things you can do to improve the experience.

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During Fluent Conference in San José 🇺🇸, I've delivered this keynote on my thoughs about what happened during more than 20 years on the web.

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A compendium of bizarre anecdotes while traveling as a conference speaker

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How to sort through the choices

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Thoughts about Brotli over TLS

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In the last months I’ve seen several apps creating what is known as a “Progressive Web App”. After 10 years of advocating using web technologies to create web experiences, this is a great time. Although I want to focus here on a big user experience issue that most of these apps are having today on Safari on iOS because of a meta tag that is being used irresponsibly.

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During Devoxx 2016 in Krakow 🇵🇱 I gave this talk on how to connect the Physical Web with the Web

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If you are into web development, you have probably heard about Service Workers, sometimes referred as “the Application Cache replacement”. I’ve been using and teaching it for a while, and I think we need to talk about it. We are trying to crack a nut with a sledgehammer. We need a Vanilla AppCache new API.

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Responsive Images, iPhone SE, shrink-to-fit and other new APIs

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3-hour course for iOS and Android

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4-hour course to create native webapps

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How To Plan, Build And Design

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3D Touch, new Responsive Web Design, Native integration and HTML5 APIs

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next evolution for Safari and native webapps

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Unknown to many web designers and developers, there are several hacks to improve the mobile experience.

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You resize the browser and a smile creeps over your face. You’re happy: You think you are now mobile-friendly, that you have achieved your goals for the website. Let me be a bit forward before getting into the discussion: You are losing users and probably money if responsive web design is your entire goal and your only solution for mobile. The good news is that you can do it right.

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The Google’s annual developer conference gave us the preview release of Android L. There are some news I want to share with web and hybrid app developers, not only about Android but also for the future of other Google-based solutions, such as Chrome OS and Chrome Developer Tools for mobile development.

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New minimal UI mode and old bugs on Safari

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The browser and the Chrome WebView

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We’ve been dealing with webapps on iOS for a couple of years: websites that after Home Screen installation become a full-featured full screen app from a user’s perspective. Finally, Chrome 31 brings that approach to Android devices: HTML5 apps without the need of packaging and a using the store for distribution.

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Problems, changes and new APIs

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This post was published originally in the Open Agenda, an ebook sent to all UN-governments sponsored by Telefonica Group to support different open techniques, including authors such as Sir Tim Berners Lee.

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Measuring and optimising mobile performance

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Android Browser, one of the most important mobile browsers out there is an eternal dying piece of software. Android hasn’t evolved its default browser since 2011 and this is affecting HTML5 developers, including Cordova/PhoneGap apps, while Google Chrome is replacing it slowly.

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HTML5 and Responsive Web Design in your head

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Cheat Sheet, Important Technologies, Tools and Frameworks

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Background notification hack for iPad and iPhone websites

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During Mobilism 2013 in Amsterdam 🇳🇱 I gave this talk about tips and tricks for mobile development with HTML5

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Mirror API, HTML5 and how to change your mind

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There is no longer any debate about whether we need to address the design needs of mobile website users._While mobile browsers and platforms are creating new challenges for us, jQuery Mobile, an open-source multiplatform UI framework, can help us succeed with our mobile apps.

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The first class HTML5 mobile platform

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Mission Impossible

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IE10 meets modern mobile HTML5

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A big step forward, Web inspector, new APIs and more

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I’m attending Google I/O in San Francisco this week and Google has released some news on Chrome: an iOS version that it may not be Chrome, the Android version out of beta, now being the default browser on Android 4.1 and some other stuff. Let’s review the news in the mobile web world.

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Yahoo! has just released the new Axis app for iOS and desktop, promoted on some blogs as a new browser. It’s a good opportunity then to explain how this kind of apps work and why they are NOT browsers. If you are a web developer it’s important for you to know what to expect for this app.

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The new iPad is here with iOS 5.1. I’ve done the usual research and, mm… there are no much new details to give you. However, the new iPad retina display remembers us some web stuff we should be aware of while creating iPad web experiences.

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Notifications, Flash and the dangerous 3D WebGL

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Welcome to the mobile HTML5 world

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Debugging webapps and PhoneGap apps on iOS

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Smartphones meet tablets on HTML5 APIs

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HTML5 evolution for iPhone and iPad

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Is it the evolution expected?

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Last week Apple released iOS 4.3 and the new Nitro engine was presented inside Safari on iOS for iPhone, iPod Touch and iPad. The iPad 2 with iOS 4.3 is on its way in US and worldwide in next days. However, a new situation was discovered last days alarming a lot of developers: Nitro is not available for PhoneGap and other webapp-related solutions. Is it a deliberate attempt to hinder PhoneGap and other HTML5 frameworks?

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Once more, we have an iOS update for iPhone, iPod and iPad: version 4.3. And like previous versions, I was playing with Safari, the native browser, to see what’s new for web designers and developers. And here are the results.

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The PlayBook tablet from RIM is about to be released in the following months. Its browser seems to have advanced (de facto) standards support, including Accelerometer, Adobe Flash Player, Web Sockets and Web Workers. In this post I will analyze browser’s compatibility.

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Why multiplatform is important

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Accelerometer, WebSockets & better HTML5 support

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Remember: most mobile devices are also phones! So, why not create link-to-call actions? If you're creating a business guide, or even for your own unique phonebook, most people will prefer to call a person instead of filling in a form on the device.

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Executing native code using the browser, how it works and the security problem behind

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HTML5, accelerometer, Flash Player 10.1 and more

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As you may know, iPhone 4 was released a few days ago; I didn’t buy an iPhone 4, but I’ve just been in Apple Store San Francisco making some testing over iPhone 3GS with iOS4, iPhone 4 and also with my iPad (iOS 3.2) and iPod Touch (iOS 3.1). After that, I’ve found many interesting behaviors that worth to be mentioned here. Unfortunately, there is no official documentation in Safari Guidelines for iPhone 4 yet to listen an official version.

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I've interviewed Dave Probert, one of the development architects of the core of
Windows 2000, Windows XP and, recently, Windows Vista. He is also in charge of the academic program in which the company shares the code Windows code with university professors of operating systems.

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ICQ and Odigo continue to expand services, offering a WAP version of their services so that you can communicate with your friends from your cell phone.

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