Field notes on building browser extensions and browser-native software.https://exoframework.com/https://exoframework.com/blog/mv3-service-worker-lifetime/https://exoframework.com/blog/mv3-service-worker-lifetime/The Manifest V3 service worker is not a background page — it's ephemeral by design. Here's exactly when Chrome kills it, why your timers and state vanish, and the patterns that survive eviction.Wed, 15 Jul 2026 00:00:00 GMThttps://exoframework.com/blog/extension-context-invalidated/https://exoframework.com/blog/extension-context-invalidated/This error appears when your extension updates or reloads while a content script is still running on a page. Here's the exact cause, why it's so common in development, and the patterns that make content scripts survive it.Tue, 14 Jul 2026 00:00:00 GMThttps://exoframework.com/blog/chrome-storage-local-sync-session-indexeddb/https://exoframework.com/blog/chrome-storage-local-sync-session-indexeddb/Extensions have four persistence options, each with different quotas, lifetimes, and sync behavior. Here's a decision guide — what each one is actually for, the quota limits that bite, and when to reach for IndexedDB instead.Mon, 13 Jul 2026 00:00:00 GMT