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I wonder how many of those tabs are affiliate links?

I looked at the source code and indeed they put referrer IDs to the amazon links. It's even a dedicated ID for each link, to see the number of purchases for each link. So mozilla is taking part in the tracking.

Do you know it's their IDs and not some of the Amazon Smile charities?

the smile links look different, burt I am not entirely sure about the referrer IDs.

They look like:

- fsclp_pl_dp_12

- fsclp_pl_dp_11

with each link having a distinct number, counting down to 1.

It doesn't look like a typical referrer ID, so it is probably something that Amazon generates, although I don't know under what condition.

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