I'd love to see them make a come-back, but it's been so damn long and they're showing so many strongly negative signs that I think they're long since rotted beyond hope, organizationally. Better they're replaced. I don't think they're an organization capable of replacing themselves with a better upstart of their own making, as Phoenix/Firebird/Firefox did to the Mozilla browser, nor of innovating—Pocket and a VPN service are their innovative monetization and self-sufficiency efforts. Not leaping into any number of promising avenues for web services that would benefit from having an open-source-friendly but well-capitalized backer offering a paid version with a built-in audience to push the Web and potentially the Internet forward, but... Pocket and a VPN. How do you miss the boat that badly? How many teams building the sorts of things Firefox should have been (Signal, Matrix, Gemini, IPFS, various open-source social network efforts like Mastodon, et c.) are small enough to comfortably fit within the Firefox org? Several, I imagine.
What a waste of potential.
I was once a strong supporter of Mozilla but never again.
How do you figure?