Except for the part where you completely ignored their point that you and anyone else with security concerns can conduct their own audit of the code and verify whether or not the telemetry functionality is performing in the manner described.
You have to understand how extremely strict Mozilla is with using third-party services for things like crash reporting and telemetry. It is extremely difficult to find services that meet our very high standard for privacy.
AFAIK Focus and Adjust make no connections to google. Check the source?