Why does Cardstashr only allow one tab open at a time?
Cardstashr enforces a single-tab policy to protect your collection data from conflicts. If multiple instances of the extension were open simultaneously, each could write different data to Chrome storage, potentially causing lost cards or corrupted binder layouts.
1Data Integrity Protection for Your Card Collection
Multiple open tabs could create race conditions where one tab overwrites changes made by another, leading to lost card positions, deleted tags, or corrupted binder data.
2Automatic Duplicate Tab Management by Cardstashr
When Cardstashr's background service worker detects a second extension tab opening, it automatically closes the duplicate and keeps the original tab active.
3Your Trading Card Data Stays Safe and Consistent
This single-tab enforcement runs silently in the background. You do not need to manage it manually. Your trading card collection is always protected from conflicting writes.
The single-tab policy in Cardstashr is a deliberate data safety feature that ensures your digital binder is never corrupted by concurrent storage writes. It runs automatically so just use Cardstashr normally.