I dread the possibility that gecko and webkit browsers truly die out, and the single biggest name in web advertising has unilateral sway over the direction of web standards.
A good example of this is that through the exclusive leverage of Google, all blink based browsers are phasing out support for Manifest V2. A widely unpopular, forcing change. If I'm using a blink based browser I become vulnerable to any other profit motivated changes like that one.
Mozilla might be trying their hardest to do the same with this AI shlock, but if I have to choose between the trillion dollar market cap dictator of the internet and the little kid playing pretend evil billionaire in their sandbox? Well, Mozilla is definitely the less threatening of the two in that regard.
Only if your OEM prevents you from installing competing browser engines. For most real computers it's not a concern.
The only change that’d get me to willingly use the engine would be the DOJ mandating the return of manifest v2 support and then barring google from contributing to it for the next 40 years.