Last week, I turned on my PC, installed a Windows update, and rebooted to find Microsoft Edge automatically open with the Chrome tabs I was working on before the update. I don’t use Microsoft Edge regularly, and I have Google Chrome set as my default browser. Bleary-eyed at 9AM, it took me a moment to realize that Microsoft Edge had simply taken over where I’d left off in Chrome. I couldn’t believe my eyes.
These are all great. I use Librewolf and Mull on the regular. That said, I doubt any of these would be able to take up the mantle that Mozilla holds. The amount of resources and manpower needed to maintain and produce a modern browser that isn’t a fork is immense.
Not to knock the devs who maintain these forks, but my guess is the majority of the work comes down to the devs at Mozilla. And if they fall, it’s likely these forks will as well, or at least will become an out of date mess.