How do I stop the Adobe Creative Cloud app from auto-launching on login?

To turn off everything Adobe launches at startup on the Mac you need to both disable its launchd jobs and the Adobe Core Sync extension. For the Adobe Core Sync extension, it is a Finder Sync extension so you can disable it under System Preferences → Extensions as described in this answer - https://apple.stackexchange.com/a/237585/23876.

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