Mozilla will always be Mozilla. They get about $0.5B each year for free, just by keeping Google the default search engine. Next, they piss it all away on the most fruitless projects and activist blogs, not to forget overpaid leadership.
With mozilla.social they were all-in to ride the new wave of alternative social media. And then discovered that Mastodon is just a bunch of hard-left misfits constantly canceling each other.
Mastodon is a miserable place and rapidly shrinking. Today it dropped below 1M MAU. Which is half of MAU just a few months ago.