Feature Request: "Launch Preview as Guest User"

When testing a multiplayer scene by launching multiple previews, it becomes very difficult to test any save/load features due to all previews launching under the same user profile and accessing the same save files.

Any testing of save/load features that occur during a multiplayer match in which the same profile is playing against itself can get pretty confusing for the developer quite quickly.

The seemingly best current option in my own use case is to disable all events that save data for Player 2 in my two-player game (or alternatively, set up a “dummy” save location for player 2 data), but then inevitably this “solution” will have to be swapped over to a production solution that can’t be tested within gdevelop’s preview system prior to exporting a build to an external service like Firebase.

With this in mind, my request is to have some sort of option within the dropdown for “Preview” for something akin to “Launch Preview as Guest User.” Alternatively, possibly an option to create multiple “test user” profiles and a “Launch Preview as User Profile…” with another drop down that lets you choose which test user to launch the specific preview for.