NewMicrosoft Edge
Microsoft Edge: Updated performance information in tab hover cards
Microsoft Edge will display enhanced memory usage information in tab hover cards, with separate controls for tab preview images and memory details. This is a UI enhancement that admins may want to communicate to users but requires no administrative action.
Microsoft's description
Microsoft Edge is updating tab hover cards to provide clearer information about tab memory usage and memory savings when inactive tabs are discarded. Users will also have separate settings for tab-preview images and memory-usage information.