- Legal backing: Unlike DNT, GPC is supported by more laws, like the CCPA, which requires businesses to honor these signals.
- Targeted approach: While DNT broadly addressed tracking, GPC focuses specifically on stopping data from being sold or shared, making it more relevant to today’s privacy needs.
- Better adoption potential: GPC was created with input from regulators, privacy advocates, and industry leaders, to align it with existing laws and address previous gaps in functionality.
But essentially, it's more or less the same.
So it seems it's less "Firefox removes DNT" and more "Firefox deprecates earlier ineffective version of GPC".