I’m looking for help closing a gap with tracking. Reddit is showing ads on my phone related to websites I visited the day before on desktop. I thought I had basic privacy protection in place. What am I missing?

Last night I was viewing the website for a certain brand of home backup batteries on my deskop computer. Research did not include searching on Reddit. Today on my iPhone, I see ads in reddit for this same brand. I use DuckDuckGo exclusively for searches on all devices.

I use Firefox on Linux with uBlock Origin and DDG Privacy Essentials on desktop. iPhone runs Firefox - yes it shows ads because I can’t run adblockers. Still, I would have expected the desktop browser to have blocked anything that would result in targeted ads.

Appreciate your ideas!