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Why Do Safari and Firefox Need Site-Specific Fixes for TikTok, Netflix, and Instagram — But Chrome Doesn’t?

Some browsers ship code that checks which domain you’re visiting and changes how the page renders based on it. Yup, you read that right. If site == X, do Y. TikTok gets special treatment. So does Netflix. So does Instagram. And so does SeatGuru. Safari and Firefox both do this. Chrome doesn’t. That tells us something interesting.