Expecting privacy (or privacy-preserving security) from Google products has always been folly.
Mozilla used to be different. However, when Brendan was purged, first doubts may have arisen. Now that we also see cyber-bully Klabnik on their payroll, the probability has risen sharply that Mozilla has been successfully subverted into a political pressure group.
Since Mozilla now is enrolled in support of the dominant ideology, it has no incentive for supporting privacy anymore, either: The dominant ideology wants minority opinion holders to be outed and ostracised.