The argument that "Google still controls Chromium so it's not good enough" is exactly the kind of FUD I'd expect to back up this kind of psyop, too.
I find this notion completely baffling. I use Chrome, Firefox and Safari more or less daily cause I test in all 3, and other than Safari feeling clunkier and in general less power-user friendly, I can barely tell the difference between the 3, especially between chrome and FF (well, other than uBlock working better in FF anyways).
> a well known kindergarden
I am baffled by the choice to include this laughably obscure example alongside a major telecom. Surely there are better options less likely to be the fault of a random lazy web developer.
Youtube, for example seems deliberately hampered on non-chrome browsers.
> I am baffled by the choice...
Rereading what I wrote, I see the unintended humour in my association.
That being said:
1. These are both websites where I don't have much of a choice whether I use them or not
2. I actually expected Verizon to have a terrible website based on the sum of my interactions with them (both online and over the phone) and how uncompetitive the market is. But I was surprised the kindergarden had a needlessly restrictive website because I thought they'd care more about their online presence. And, to be clear, the kindergarden's website is fancy and expensively designed, so their lack of Firefox support can't easily explained by laziness.