I would probably have dropped Firefox back then if it was the only browser that I couldn't watch Netflix in, and I wouldn't be the only one. I don't think Mozilla can bear the loss of userbase.
They now have an interest in limited edition color drops and with their bespoke charactaristic allowing users to select color that best resonates with them.
You and I, as mere mortals, may not know what this means, but rest assured, mozilla does.
youtube, prime video, netflix, banking, github
none of that for firefox users
Like which one?
Try searching for "only chrome".
If you are shown a product ad whilst browsing searchengine.example and then later look up the product at reviews.example, then end up making a purchase at shop.example, your browser sends all of these events to an aggregation service that allows shop.example to understand (at least in aggregate, assuming you trust the cartel running the aggregation service) that you were exposed to their product at searchengine.example and further exposed to their product at reviews.example.