In Firefox, pinned tabs are limited to the specific browser window in which they are created. This behavior differs from Safari, where pinned tabs persist across all open windows. When a Firefox window containing pinned tabs is closed, those tabs are permanently removed. This implementation undermines the intended purpose of pinned tabs, which is to provide persistent, easily access to sites regardless of session or window state. Pinned tabs should ideally remain consistent across all browser windows and persist until explicitly unpinned by the user. The current behavior results in a poor user experience and discourages users who expect cross-window and session persistence, functionality that aligns more closely with the concept of “pinning.” I have raised his limitation repeatedly, but it remains unaddressed. A more consistent, user-centric approach would ensure pinned tabs are retained globally until manually dismissed.