I'm always hesitant to use such patched versions because you have to trust your security to some 1 random anonymous stranger on the internet.
Also because they tend to be someone's hobby project and when they get bored of it (as we all do) you'll be left with an unpatched security nightmare. Which is exactly what happened with Librefox. Looks like it was last updated 3 years ago and is abandoned.
It's a patchset over firefox removing so called "antifeatures". Anyway being the last commit 34 years old I wonder how do they actually remove the Mozilla VPN ads.
There's also Librewolf. Would be curious to hear on takes if anyone has looked closer on both. Main difference is that Librefox doesn't really patch or fork Firefox itself - it's "just" config and extensions, whereas Librewolf is a more classic fork (though very close to upstream).
The default browser of Garuda Linux is a rebranded Librewolf build.
https://github.com/intika/Librefox
Edit: I meant Librewolf, not fox.