Will Microsoft do it just because the potential exists? No.
Mozilla CEO takes a $3m salary and their biggest earner by many magnitudes is a search partnership with Google. Nothing is going to change with how they treat Firefox at a consumer-level until they need to man the battle stations with a rugpull on losing that partnership.
"Why would they lose it?" AI happened and the current economic climate means Google is reducing spending by killing things that don't bring tangible value.
