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.

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. AUXLE AUXLE I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies. Costea Adrian Costea Adrian Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system. Bastien Labelle Bastien Labelle Full stack dev w/ 20+ years of experience Nam Tran Nam Tran 10 years as fullstack developer Luca Liberati Luca Liberati I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture 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. Jaime Orts-Caroff Jaime Orts-Caroff I'm a Senior Android developer, open to work in various fields Jen Jacobsen Jen Jacobsen I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses. I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain. Alvin Voo Alvin Voo I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing. My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream. What I bring to your project: Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causes—like significantly reducing memory usage by optimizing complex DB joins. Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams. Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.

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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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