The thing about Firefox is that it's an UNKNOWN evil. Mozilla always feel like it's on the cusp of bankruptcy and constantly searching for new dark patterns to sneak in. When Wikipedia needs money they beg for it, but don't purposely sabotage the user experience to get funding.
Mozilla does that with every new release. I always feel like they've added some shady new malware/adware with every new patch, and then use some stupid UI tweak to try to hide it. It's only a matter of time before they sneak Norton in there. I trust the Firefox team even less than Facebook at this point. Firefox just isn't trustworthy, whereas Chrome is a known compromise.