Common Issues general

App Not Working on Some Browsers or Devices

Your app works fine on your browser (usually Chrome) but breaks on other browsers like Safari or Firefox, or on specific devices. Features don't work, layouts break, or the app doesn't load at all.

Common Causes

  • Using browser-specific APIs not supported everywhere (e.g., some CSS features in Safari)
  • JavaScript syntax not supported in older browsers
  • Safari has stricter cookie and storage policies that can break auth
  • Mobile browsers have different viewport handling
  • WebKit rendering differences causing layout issues on iOS

How to Fix It

  1. Test on the broken browser — open the console (F12 or equivalent) for error messages
  2. Check Can I Use (caniuse.com) for any APIs or CSS features your app relies on
  3. If Safari breaks auth, check cookie settings — Safari blocks third-party cookies by default
  4. Add appropriate CSS prefixes for Safari (-webkit-) and Firefox (-moz-)
  5. Test on actual devices, not just browser dev tools device emulation

Real developers can help you.

Simon A. Simon A. I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows. Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well. ISHANTDEEP SINGH ISHANTDEEP SINGH Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems. Caio Rodrigues Caio Rodrigues I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures. I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations. Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization. I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems. My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.** MFox MFox Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking. BurnHavoc BurnHavoc Been around fixing other peoples code for 20 years. Meïr Ankri Meïr Ankri Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews. Stanislav Prigodich Stanislav Prigodich 15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it. Milan Surelia Milan Surelia Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems. Expertise: 💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web. 🖋️ Sharing insights through technical writing, blogging, and open-source contributions. 🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences. Notable Achievements: 🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX. 🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development. 🌟 Open source contributions on Github & StackOverflow for Flutter & Dart 🎖️ Worked on improving app performance and user experience with smart solutions. Milan is always happy to connect, work on new ideas, and explore the latest in technology. Matt Butler Matt Butler Software Engineer @ AWS

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Frequently Asked Questions

It works on Chrome but breaks on Safari. Is that common?

Very common. Safari has different CSS rendering, stricter cookie policies, and some JavaScript APIs aren't fully supported. AI tools typically test only on Chrome.

Do I need to support all browsers?

At minimum, support Chrome, Safari, and Firefox — that covers 95%+ of users. A developer can identify and fix the specific compatibility issues.

Related Common Issues Issues

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