I saw movie on youtube.com you searching to gather money thanks to adds and AI. My suggestion is simple: open a shop like allegro.pl or ebay.com. You will integrate it with Firefox to made everything privacy. Further, you can also allow others to use this AI, if you wish.
How it would work? When user type prompt in shop site, shop will shown related goods, but additionally related tags. In fact, site will send each related tags and Firefox (thanks to AI) will filter tags based on browser history. Non intrusive way to present adds and gather money. No data will be send to Mozilla, Firefox will download each related tags and filter it locally.
You can create (in future) script, which will be builtin in browser and use AI. To use it, site vendor will but script tag with source=“mozilla://filter/?tag-dom-id”.
Use case:
Juilia search for new gaming laptop. She went onto shop.mozilla,com, type laptop and Firefox will download each related tags. Next AI will be ran to filter tags, which will be not related. AI decided to shown gaming and some_linux_laptop_vendor tags, cause Julia often look at gamingonlinux.org.
What do you think? Mozilla will gather some percent of value of goods or Mozilla could sell this technology (right to use) to giants like allegro.pl or ebay.com.