Hi Jamf Nation Guru,
We managed to block extensions in Chrome and Edge on our Macs by configuring custom settings in JamfPro.
However, we couldn't find a similar solution for Safari. Have you had any success with blocking extensions on this browser?
All safari extensions should be coming from the MacApp store, if you have the mac app store blocked this should solve extensions in safari. this can be done with a restrictions setting in a config profile. I would recommend testing this throughly before pushing it out though in case you have users who need access to the app store.