Google Drive File Stream keeps enabling it's Finder extension I do not want any Finder extensions and turn I them off in System Preferences. After quitting and reopening Google Drive File Stream, its Finder extension always turns back on.

What can I do to ensure it remains turned off?
Google Drive Stream is defaulted to automatically start at login within the Google Drive Stream preferences.  

There are two places it can be set - system (host) wide, or user only.  The locations are as follows:


System Wide: /Library/Preferences/com.google.drivefs.settings
User Only:  ~/Library/Preferences/com.google.drivefs.settings


Check to see settings by using the defaults command to get the AutoStartOnLogin setting.  For example, to see the setting system wide issue the command:

$ sudo defaults read /Library/Preferences/com.google.drivefs.settings AutoStartOnLogin


Do this for both locations by changing the path to the .settings file as described above.

If either come back "true", you've found the cause.  Next, write a new value to turn it off.  System wide example:

$ sudo defaults write /Library/Preferences/com.google.drivefs.settings AutoStartOnLogin -bool false