Firefox will — by default — protect users by blocking tracking: https://blog.mozilla.org/futurereleases/2018/08/30/changing-our-approach-to-anti-tracking/
@dfeyer you seem to be confusing things. Firefox pushes nothing to Cloudlare unless you ask for it. But let me also remind you that you already today "forward" that data to a 3rd party: your DNS provider.
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