SelfCAD is an online CAD and 3D design software

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FAQ > SelfCAD Editor > Does SelfCAD work in Firefox private window?
Does SelfCAD work in Firefox private window?

Unfortunately, SelfCAD does not work in the Firefox private window. The application requires a feature called IndexDB to work properly, and the private window in Firefox disables it.
To avoid the issue, please reload the application in the standard window or try the private mode in another browser. Chrome and its Incognito Mode, for example, allows the IndexDB to work correctly.