Snapshots work by saving the data in the local repository, which makes accessible from all your tabs and after page reloads. The data displayed is always for the target (right) snapshot selected, but it is compared to the base (left) snapshot if it is different. Memory details information is presented only when the target snapshot is "current + memory info". This is done as the memory object can become too complex to store and process it quickly in JSON.

By default the snapshots are saved with a datetime like string for a name. You can always rename them by navigating to the "Snapshots" menu, and type a new name in a selected snapshot name textbox.