> For starters, Mozilla said that after it turns on DoH by default for US users, Firefox will contain a mechanism to detect the presence of any local parental control software or enterprise configurations.
> Additionally, Mozilla is also working with ISPs to make sure users won't use DoH as a way to bypass legally-set blocklists.
> The organization said it's been asking ISPs and providers of network-based parental control solutions to add a "canary domain" to their blocklists. When Firefox will detect that this canary domain is blocked, it will disable DoH to prevent the feature to be used as a filter-bypassing solution.
