Database

Service workers and background scripts for event-driven extension logic, lifecycle management, and persistent tasks

Content scripts for DOM manipulation, page interaction, and isolated world execution in browser extensions

Cross-browser extension compatibility across Chrome, Firefox, and Safari with API normalization and build strategies

Publishing browser extensions to Chrome Web Store and Firefox Add-ons including review processes and automation

Chrome Manifest V3 fundamentals including configuration, permissions, and migration from V2

Message passing between extension components including content scripts, service workers, popups, and external pages

Building popup and options page UIs for browser extensions with responsive layouts and framework integration

Extension storage APIs and state management patterns including sync, local, and session storage