Mozilla seized an opportunity to bring trustworthy AI into Firefox
Therefore, as part of the changes today, we will be bringing together Pocket, Content, and the AI/ML teams supporting content with the Firefox Organization
This is from the Mozilla release. The second quote does say "Firefox Organization" and not "Firefox", but it seems clear they are planning on integrating AI into Firefox.
But, I've reread @NotSteve_'s comment and they were saying the funding earned from AI could be put into Firefox, not AI itself. NotSteve wasn't claiming that putting AI into Firefox would bring in more funding, only that AI could be a separate source of revenue. So my question is moot.