Firefox Data Removal Pilot, another Partner called Kanary wants your Data in the name of Privacy

Once you submit your information, our Data Removal partner, Kanary, will continuously scan for your information on known Data Removal and people search sites. Once your personal data is found on one of these sites, we automate the process of getting it removed. Sometimes, even if your data was removed from one of these sites, it may reappear at a later date. Data brokers and people search sites regularly collect data, and removal does not necessarily prevent many of these sites from sharing it again later.

Data removal is not guaranteed. At times, Data Removal requests cannot be completed or require additional steps. Even still, Kanary continues to work on removing your personal information. In the event that a request is On hold, manual removal instructions are shown in the bottom of the expanded card. These instructions provide another means to attempt removing your personal information from a data broker or people search site. The instructions are gathered from each specific site, and so vary depending on the site requirements.

In other words, give me your data I forward it to a unknown third-party and they cannot guarantee the removal.

Btw most search providers, normally every provider must comply with the law, which means you can contact them yourself without involving another third-party and request the removal. However, I admit finding those removal request formulas are actually hard. The reason why they are often hidden is to prevent abuse and if you use a normal business email you often only get a Bot answer back.