Session Saver

A browser window can become a working environment: research, documentation, project tools and reference material spread across many ordered and pinned tabs. Losing that state to a crash or an accidental close turns recovery into a slow reconstruction task.

Session Saver provides automatic recovery points and deliberate named snapshots, then lets a user search, inspect and restore an entire session, one window or selected tabs. Everything remains inside the browser profile, with no account or remote service between the user and their browsing history.

A useful snapshot must preserve more than URLs. Window boundaries, tab order, pinned and active state, and supported Chrome Tab Groups all affect how a workspace returns.

Manifest V3 service workers are suspended when idle, so automatic recovery cannot depend on a permanently running process. Local writes, retention cleanup and change-triggered captures also need to avoid racing or storing the same workspace repeatedly.

Existing version 1 data could not be replaced optimistically. A failed migration had to leave legacy keys intact, while imported files needed validation and fresh identifiers before they could enter the local repository.

The extension captures browser windows, tabs and supported groups into a validated schema. Users can create named snapshots from the popup, while alarms and browser-state changes create bounded automatic recovery points in the background.

A typed repository serializes writes to chrome.storage.local, hashes captured window state to skip duplicate recovery points and applies retention separately to automatic and change-triggered snapshots. Manual, imported and pinned sessions are kept until the user removes them.

The full library supports search, pinning, rename, export and selective restore. Import validates schema v2 or converts supported legacy collections, remaps internal identifiers and sanitizes text before persistence. The v1 migration writes and verifies schema v2 before removing old storage keys.