How old is that game? Are there other people in your demographic who also play the game, and then searched for the same thing?

I would guess the likely culprits are

Firefox extensions

Search engines

Wikipedia

Other search results you may have opened or pre-loaded (not a default Firefox behaviour)

It's duckduckgo. Search duckduckgo.com with the term "restaurants near me." You'll often get responses that are close to your IP location.

That couldn't happen unless DDG passes your IP address on to Bing. It's possible they censor part of the IP and only pass part of it to Bing, but probably not.

(Go ahead! Try it!)

Since Bing sells to data brokers, data brokers know your IP is linked to a search for rambutan, even without fingerprinting your browser.

I'm not calling duckduckgo.com a honeypot... I'm also not calling it not a honeypot. But it knows too much for something supposedly private.

Any closed source firefox extension that has access to the browser display could be parsing the texts and selling it and your IP and other identifiers to data brokers. It's part of how these extensions are profitable.

Cloudflare also does highly advanced fingerprinting and has a script called cloudflare insights, so it seems likely that any cloudflare activity is generating marketing data.

You say you were not using a vpn. Then the site has your ip and probably has meta/google ads or other shit running on it and links the product with your ip.

This data is added to some data broker/ ad network and you see an ad when you visit a site using this network as you have "signalled" interest in the product by viewing the product page the first time.

If the EFF de anonymization tool can de anonymize your browser, then the ad network can too.

Try searching for something with tor browser - no javascript

Out of what you say, probably cloudflare or incomplete history. Have a great day!

I don't see ads but if I were to, and despite all my precautions some would be on topic based on my past behavior I would methodically dissect to find out the leak. Namely I would try to automate the process :

• identify a place showing ads
• take an action, e.g. search or browser, on a verifiable unique topic (in order to prevent from generic suggestions, e.g medication during flu season)
• verify if the ads become relevant
• enable/disable any of the tools used, repeat