Disable the run of safe files in safari from terminal

I tried to disable the run of safe files in safari from terminal, using the command below, but is not disabling it.

Does someone know if this command is still usable ? or if there is another option to disable it ?

defaults write com.apple.Safari AutoOpenSafeDownloads -boolean False

Safari (Version 14.1.1 (16611.2.7.1.4)

MacOS Big Sur 11.4