LibreWolf strips Firefox of telemetry, adds privacy and security tweaks, disables Pocket, and ships with uBlock Origin by default. It's basically Firefox with hardened defaults and no Mozilla connections.

If Firefox ever collapsed, libreWolf couldn't continue independently long-term, they rely entirely on Firefox’s upstream codebase. They don’t maintain their own engine (Gecko), so they'd lose the foundation their browser is built on. It'd be the end unless a fork of Gecko emerged.

Isn’t that a fork of Firefox that still relies on Firefox development?

Yes. And it seems like a lot of people who shill for it don't understand that. If every Firefox user switched to LibreWolf then there would be no more Firefox and then no more LibreWolf. Firefox has done some questionable things lately but all of us jumping ship to something like LibreWolf isn't the answer.

Would it continue to exist if Mozilla shutdown and Firefox was no longer maintained?

Nope.

It's one that doesn't yield any benefit to Google, in the now.