The answer to “what is Firefox?” on Mozilla’s FAQ page about its browser used to read:
The Firefox Browser is the only major browser backed by a not-for-profit that doesn’t sell your personal data to advertisers while helping you protect your personal information.
Now it just says:
The Firefox Browser, the only major browser backed by a not-for-profit, helps you protect your personal information.
In other words, Mozilla is no longer willing to commit to not selling your personal data to advertisers.
A related change was also highlighted by mozilla.org commenter jkaelin, who linked direct to the source code for that FAQ page. To answer the question, “is Firefox free?” Moz used to say:
Yep! The Firefox Browser is free. Super free, actually. No hidden costs or anything. You don’t pay anything to use it, and we don’t sell your personal data.
Now it simply reads:
Yep! The Firefox Browser is free. Super free, actually. No hidden costs or anything. You don’t pay anything to use it.
Again, a pledge to not sell people’s data has disappeared. Varma insisted this is the result of the fluid definition of “sell” in the context of data sharing and privacy.
I would still suggest folks to at least go through Librewolf’s FAQ and Docs. For example, Librewolf disables DNS over HTTPS by default. See https://librewolf.net/docs/faq/#doh-whats-the-stance-on-doh
If anyone reading this is not configuring their DNS on their routers or on their Linux machines using systemd-resolved or something similar, I suppose they should probably at least configure their browser to use DNS over HTTPS. It should be better than using the default DNS resolver provided by your ISP.
As far as I’m aware, Librewolf’s team isn’t making significant changes to Firefox’s code or “patching out” some spooky telemetry. Librewolf is essentially pre-configuring a bunch of “privacy” and “security” related settings in Firefox for their users. But alternatively any user can configure these things themeselves and make their own choices. Even pre-installing extensions and add-ons on fresh Firefox profiles can be easily done by any user using Firefox policies (which is what Librewolf uses to pre-install Ublock Origin.) But let’s say you also want another extension like Bitwarden to be pre-installed on every fresh Firefox profile. Or you don’t trust DuckDuckGo and instead want to configure Firefox to use a self-hosted SearXNG instance as your default search engine. Then maintaining your own Firefox policies can help you do all this.
I understand it is far simpler and far more desirable to have “privacy and security” out-of-box without having to configure anything at all. But it is probably not a bad idea to take the time to see what configurations you can make to Firefox yourself, even if you decide to use LibreWolf. You may end up wanting your own configurations in addition to what Librewolf’s team decides for you.