From Mozilla:

Monitor Plus, Mozilla’s premium data broker scan and removal service, officially shut down on December 17.

Mozilla had partnered with OneRep, a data removal company with ties to data collection services, and had been told about the firm’s behavior in early 2024.

Up until this point, Mozilla was dragging its feet:

• 2024-03-14 - Kreb’s story undercovers OneRep founder background - https://krebsonsecurity.com/2024/03/ceo-of-data-privacy-company-onerep-com-founded-dozens-of-people-search-firms/
• 2024-03-22 - 8 days later - Mozilla statement to drop OneRep - https://krebsonsecurity.com/2024/03/mozilla-drops-onerep-after-ceo-admits-to-running-people-search-networks/
• 2024-10-22 - 7 months later - Mozilla FAQ update about still searching for provider to replace OneRep - https://support.mozilla.org/en-US/kb/securing-new-partner-monitor-plus
• 2025-02-10 - today - almost 11 months later

Ten more months, and Mozilla is no longer looking for a partner, choosing to shutter the program.