Never heard of that one, I was telling somebody the other day about IceWeasel. So there definitely are FF clones. Or I guess you could just compile Firefox yourself and remove the denylist portion of the code. Would be extra funny if they compiled a version specific for France (because why block sites for everybody else?) and put it next to the regular one on their website with text that said oh BTW if you're in France definitely only download this version, wink wink.
Yes but 90% of the people using Firefox won't bother or notice. I already struggle trying to make all my relatives switch to Firefox, I can't imagine getting them to download a specific version or build it themselves...