As a multi-decade long Firefox user, I am going to say no.
Firefox is produced by a single company and its users are completely beholden to the choices that the company makes.
In some ways, Chromium is closer to being the Linux of browsers. There are multiple “distributions” or instances of the technology ( Chrome, Edge, Brave, and others ). There is at least some collaboration on the core.
Chromium is not developed nearly as collaboratively as Linux though and certainly it is dominated by Google.
What we need is something like Ladybird which is community driven prior to corporate involvement and that is led by that community and not by a company.
Not that we have not lost this opportunity before. KHTML was community driven before Apple co-opted it for WebKit which Google later forked to Blink.
Ladybird is perhaps already in a better spot being cross-platform vs only the browser in SerenityOS. It is also a “complete” project with JavaScript and multimedia already built in. Let’s work to keep the project together as a browser and not chase bits of it getting ripped off and taken elsewhere.