localStorage (Chrome extension bridge)

A synchronization pattern that bridges the gap between synchronous web-standard localStorage and the asynchronous chrome.storage API for extension contexts.

Modern Chrome extensions often require a bridge to handle the architectural split between content scripts and background service workers. While standard localStorage provides simple (5MB limit) synchronous access within a single origin, it fails to reach the extension's background context or sync across devices. This bridge pattern utilizes the chrome.storage API to provide a unified data layer, offering features like the unlimitedStorage permission and automatic cross-device synchronization. By implementing a messaging relay or a reactive state manager, developers can maintain a consistent data flow between the DOM-facing frontend and the extension's persistent backend.

https://developer.chrome.com/docs/extensions/reference/api/storage