In the past the Firefox config setting "security.enterprise_roots.enabled = true" which let Firefox use the windows certificate store, fixes this, but this doesn't work anymore. I have tried "security.enterprise_roots.enabled = false" and reactivate the Eset root certificate in Firefox again, without success.
Outside of Sandboxie Firefox uses the Eset certificate and also with Internet Explorer 11 and PaleMoon 26.5 x86 (palemoon.exe renamed to firefox.exe) inside of Sandboxie.
Does anyone know a solution?