Settings one is interesting, it does appear that you cannot block it[0] and that is sad.
The other two appear to be safe browsing and automatic update related. Those two services can be disabled form the regular settings UI, I think? Have you found that to not work?
The other two appear to be safe browsing and automatic update related. Those two services can be disabled form the regular settings UI, I think? Have you found that to not work?
[0] https://support.mozilla.org/en-US/kb/how-stop-firefox-making...