On eBay, on the orders page, near the top of the list is a checkbox which when checked should cause the entire list of orders to all become checked, allowing a single operation to apply to the entire list of checked orders. Checking this box is not causing the list of orders to become checked. It works in Firefox private mode. The problem is not being caused by any of the extensions - it persists after disabling every extension. Windows 10, FF 121.0.1 (64-bit)