--- title: "#firebase articles | Hashnode" description: "Explore 1,478 articles tagged #firebase on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/firebase" --- Tag # #firebase 1,478 posts · 1,887 followers [Stacklyn Labs](https://hashnode.com/@stacklynlabs) · [1d ago](https://hashnode.com/posts/flutter-package-name-app-signing/6af3d01949248b5139258576) ### [Flutter Package Name Change and App Signing: Fixing Mistakes](https://stacklynlabs.hashnode.dev/flutter-package-name-app-signing?utm_source=hashnode&utm_medium=feed) Wrong package name already live, lost keystore, Google Sign-In broken after the ID change? What Play and the App Store let you recover. 11 min read · [stacklynlabs.hashnode.dev](https://stacklynlabs.hashnode.dev/flutter-package-name-app-signing?utm_source=hashnode&utm_medium=feed) [CounterKit](https://hashnode.com/@counterkit) · [2d ago](https://hashnode.com/posts/your-ai-built-the-app-these-3-holes-ship-with-it/6af2215b241ea5437a6954d0) ### [Your AI built the app. These 3 holes ship with it.](https://counterkit.hashnode.dev/your-ai-built-the-app-these-3-holes-ship-with-it?utm_source=hashnode&utm_medium=feed) Your AI builder optimised for one thing: the demo works. It did not optimise for safe. Here are the three holes I find in almost every AI-built Firebase app — what they are, how they're exploited, and 3 min read · [counterkit.hashnode.dev](https://counterkit.hashnode.dev/your-ai-built-the-app-these-3-holes-ship-with-it?utm_source=hashnode&utm_medium=feed) [Sai Ram Kotha](https://hashnode.com/@sairamkotha) · [2d ago](https://hashnode.com/posts/gemini-nano-background-use-blocked-quotas/6af191bc4baa70c9267044cb) ### [Gemini Nano Stops When Your App Leaves the Screen: What That Breaks](https://sairamkotha.hashnode.dev/gemini-nano-background-use-blocked-quotas?utm_source=hashnode&utm_medium=feed) Gemini Nano only runs when your app is on screen. What that breaks, the two usage limits, and when a cloud fallback is the right call. 8 min read · [sairamkotha.hashnode.dev](https://sairamkotha.hashnode.dev/gemini-nano-background-use-blocked-quotas?utm_source=hashnode&utm_medium=feed) [Vela Apps](https://hashnode.com/@velaapps) · [4d ago](https://hashnode.com/posts/firebase-dynamic-links-is-shut-down-how-to-replace-it-in-your-mobile-app/6aef4ac2d6683a7da5723917) ### [Firebase Dynamic Links is shut down: how to replace it in your mobile app](https://velaapps.hashnode.dev/firebase-dynamic-links-is-shut-down-how-to-replace-it-in-your-mobile-app?utm_source=hashnode&utm_medium=feed) Firebase Dynamic Links stopped on 25 August 2025. What it did, what you need to replace it, and six steps to migrate a mobile app. 4 min read · [velaapps.hashnode.dev](https://velaapps.hashnode.dev/firebase-dynamic-links-is-shut-down-how-to-replace-it-in-your-mobile-app?utm_source=hashnode&utm_medium=feed) [Sandeep Joshi](https://hashnode.com/@notifysphere) · [4d ago](https://hashnode.com/posts/fcm-unregistered-error-requested-entity-was-not-found-and-how-to-fix-it/6aeeb68a36508ac8f8003281) ### [FCM UNREGISTERED Error: Requested Entity Was Not Found, and How to Fix It](https://notifysphere.hashnode.dev/fcm-unregistered-error-requested-entity-was-not-found-and-how-to-fix-it?utm_source=hashnode&utm_medium=feed) FCM 404 UNREGISTERED means the device token no longer works. Why it happens, how to clean up tokens, and when it's a different error. 6 min read · [notifysphere.hashnode.dev](https://notifysphere.hashnode.dev/fcm-unregistered-error-requested-entity-was-not-found-and-how-to-fix-it?utm_source=hashnode&utm_medium=feed) [Sandeep Joshi](https://hashnode.com/@notifysphere) · [4d ago](https://hashnode.com/posts/fcm-sender-id-mismatch-403-and-messaging-mismatched-credential-how-to-fix-it/6aeeb5c136508ac8f8fe0b85) ### [FCM SENDER\_ID\_MISMATCH (403) and messaging/mismatched-credential: How to Fix It](https://notifysphere.hashnode.dev/fcm-sender-id-mismatch-403-and-messaging-mismatched-credential-how-to-fix-it?utm_source=hashnode&utm_medium=feed) FCM 403 SENDER\_ID\_MISMATCH means your server sends from a different Firebase project than the app's token. How to find and fix it. 5 min read · [notifysphere.hashnode.dev](https://notifysphere.hashnode.dev/fcm-sender-id-mismatch-403-and-messaging-mismatched-credential-how-to-fix-it?utm_source=hashnode&utm_medium=feed) [Sandeep Joshi](https://hashnode.com/@notifysphere) · [6d ago](https://hashnode.com/posts/fix-no-apns-token-specified-before-fetching-fcm-token-on-ios-react-native-flutter/6aec90f437293547952c2f52) ### [Fix “No APNS token specified before fetching FCM Token” on iOS (React Native & Flutter)](https://notifysphere.hashnode.dev/fix-no-apns-token-specified-before-fetching-fcm-token-on-ios-react-native-flutter?utm_source=hashnode&utm_medium=feed) What the FCM error means on iOS and how to fix it in React Native, Flutter and Swift: capabilities, call order and swizzling. 5 min read · [notifysphere.hashnode.dev](https://notifysphere.hashnode.dev/fix-no-apns-token-specified-before-fetching-fcm-token-on-ios-react-native-flutter?utm_source=hashnode&utm_medium=feed) [Sai Ram Kotha](https://hashnode.com/@sairamkotha) · [Nov 4](https://hashnode.com/posts/android-nano-firebase-hybrid-backend-proxy/6aeb71e57b8fb1907412e57c) ### [Android: Gemini Nano, Firebase Hybrid and a Backend Proxy](https://sairamkotha.hashnode.dev/android-nano-firebase-hybrid-backend-proxy?utm_source=hashnode&utm_medium=feed) Gemini Nano, Firebase AI Logic hybrid modes and a backend proxy for Android AI features, with the four modes and what to log. 8 min read · [sairamkotha.hashnode.dev](https://sairamkotha.hashnode.dev/android-nano-firebase-hybrid-backend-proxy?utm_source=hashnode&utm_medium=feed) [Nartan Naik](https://hashnode.com/@nrtnnaik) · [Nov 2](https://hashnode.com/posts/building-creatorlens-ai/6ae87e58e6f3846779e36357) ### [From Copy - Pasting Usernames to One - Click Imports: Building CreatorLens AI](https://nrtnnaik.hashnode.dev/building-creatorlens-ai?utm_source=hashnode&utm_medium=feed) How I built CreatorLens AI, a Flutter, React and Firestore app that imports Instagram creators in bulk, and got past Vercel's 10-second limit. 6 min read · [nrtnnaik.hashnode.dev](https://nrtnnaik.hashnode.dev/building-creatorlens-ai?utm_source=hashnode&utm_medium=feed) [CounterKit](https://hashnode.com/@counterkit) · [Nov 2](https://hashnode.com/posts/show-dev-to-i-built-a-complete-ordering-house-tab-system-for-small-counters-plain-js-firebase-live-demo-inside/6ae8ffeface1a2c8176ee390) ### [Show dev.to: I built a complete ordering + house-tab system for small counters — plain JS + Firebase, live demo inside](https://counterkit.hashnode.dev/show-dev-to-i-built-a-complete-ordering-house-tab-system-for-small-counters-plain-js-firebase-live-demo-inside?utm_source=hashnode&utm_medium=feed) CounterKit is a small, self-hosted system for independent cafés, bakeries, and delis whose regulars order by name and run house tabs — the notebook-and-memory workflow, minus the notebook. Try it firs 3 min read · [counterkit.hashnode.dev](https://counterkit.hashnode.dev/show-dev-to-i-built-a-complete-ordering-house-tab-system-for-small-counters-plain-js-firebase-live-demo-inside?utm_source=hashnode&utm_medium=feed)