This idea comes from the Pale Moon reddit, but I think it might be a clever idea, especially for those that choose forked browsers for UI customization above all else:
https://www.reddit.com/r/palemoon/comments/tde75d/palemoon_outside_chrome_inside_is_it_possible/
Think of it like IE-Tab for Chromium. It could be in the form of an extension, or a a shell for WebKit/Blink. Best to read what's there. The idea is that as Pale Moon and other forks become less compatible with the modern web, one could run a Chromium session inisde the tab of a Gecko browser.
Could such a thing work?