You use softwares with auto "cleaning" settings like System/Registry Cleaners or Antivirus/Security Software?. it is a public computer?

It is my personal Computer. I used a registry cleaner once but a long time ago and it isn't installed on this system anymore, so no active cleaners running. As for antivirus, only the standard windows defender is active.

Edit: Before I reinstalled there was stuff inside the download history, but it was months old and newer downloads wouldn't show up after restarting firefox. I suspect its places.sqlite corrupting but why and even after clean reinstall?