it's hilarious that they basically accused their entire user base of being too dumb to understand, so that's why they didn't say anything about it, while simultaneously thinking this wouldn't explode in their faces. which was S-tier fucking dumb.
Why Fennec? I use Mull and both have warnings that they are not fully open-source. It seems to me that only Librewolf is good, too bad it's not available for Android.