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Will Firefox trim their own header additions when searching?

e.g. here's the page that Firefox generates when I try to search "Dragon Quest XI" in a Private Window on Amazon via the address bar:

https://www.amazon.com/s?k=dragon+quest+xi&link_code=qs&sour...

Note the 'mozilla-20' tag at the end.

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That's not the same as the referrer header; it's mostly invisible to the end user without inspecting the raw request data.

That's an affiliate link. It seems then Mozilla is injecting affiliate codes on Amazon searches.

What does the browser has to do with how amazon implements their search? Amazon probably parses the User Agent and puts mozilla there for some reason.

That seems rather unlikely. If it's not the browser itself, then it's more likely to be an extension inserting it.

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