I really can't stand their skewed priorities in contrast to the state of Firefox.
Mozilla laid off the entire Servo team (new browser engine built with rust) in 2020 and shifted more focus to products and services other than Firefox (like their VPN, Pocket, etc.) - this is public knowledge, they literally published the email that was sent to employees that day (https://blog.mozilla.org/wp-content/uploads/2020/08/Message-to-Employees-Change-in-Difficult-Times.pdf ).