The issue isn’t whether the “company cares”.
It’s whether they end users fix your own problems, or force you into techno-feudalism where the only way to get a problem fixed is to hope the company cares enough to fix it for you.
The simplest example of Nvidia completely failing here is old hardware support. AMD cards doesn’t have that problem because the drivers are open source and upstream. These new Nvidia drivers don’t sound like they’ll help - they’re not maintainable and therefore not upstreamable.
Firefox died long ago.
It was an engine fight, and Mozilla decided not to participate.