Endless feature creep made browsers are the most complex programs ran by most users. I disbelieve a new browser could be made (securely, or at all). Forks are nice (I use Librewolf btw) but they do not deviate significantly. The browser market is unhealthy and unrecoverable: either it’s Google vs Firefox forever or one wins.

Perhaps the alternative to the all-in-one software solution is just to use smaller programs dedicated to each common use of the modern browser (a video player for playing video, an old style internet text-page reader for browsing text, etc).