Recovery snapshots and undo

Before selected state-replacing actions, Tab Organizer writes a recovery snapshot on this device. If that snapshot cannot be saved, the action is canceled and your current tabs stay unchanged. After a completed action, an Undo control can restore the snapshot.

This version has no screenshot of the confirmation dialogs. Read the safety sentence in each dialog; it is the same contract described here.

What it protects

A recovery snapshot captures the live window, group, and tab layout so it can be replayed through the session loader. This version writes a snapshot before:

• loading a session;
• adopting groups when you enable Tab Groups Sync (BETA);
• dissolving or ungrouping groups;
• closing tabs from rarely visited recommendations; and
• committing a migration import.

Deletion Mode bulk close does not use this same snapshot list. Treat Chrome's reopen-closed-tab path as the immediate recovery for that flow — see Close tabs in bulk.

Before a change

Each guarded confirmation states that a recovery snapshot is saved on this device first. Continue only after that sentence is visible and you intend the replacement.

If the extension reports that a recovery snapshot could not be saved, stop. The original action did not run. Fix storage pressure or retry later rather than repeating the confirmation.

Snapshots live in extension storage on this profile. Clearing extension data, uninstalling, or losing the profile removes them. They are not an off-device backup. Keep a JSON backup for that — Run a recovery drill.

Undo

After a guarded action completes, use Undo while it is still offered to restore tabs from the recovery snapshot.

Steps

1. Complete only one guarded action at a time.
2. If the result is wrong, choose Undo immediately.
3. Wait until the list refreshes before starting another destructive action.
4. If Undo is no longer offered, do not guess: export a backup if you still can, then follow session restore only after reading its replacement warning.

Undo replays the snapshot through the session loader. It can restore tabs and groups captured in that snapshot. It cannot recover unsaved form or editor state inside a page.

Limits

• Snapshots are local and finite. This version keeps a short list, not an infinite history.
• A failed snapshot aborts the action; a successful snapshot does not by itself export a .tabsession file you can copy elsewhere.
• Enabling Sync after an undo can overwrite native groups again. Leave Sync off until the restored assignments are the ones you want.

For file-based restore, use Restore a session. For a rehearsal that includes an off-device file, use the recovery drill.