Firstly, journalists are not for the most part going to be the people designing the webpages. They will submit copy to some kind of CMS. So if a site isn't work

Firstly, journalists are not for the most part going to be the people designing the webpages. They will submit copy to some kind of CMS. So if a site isn't working well on Firefox/mobile/whatever it's generally not going to be the journo who is to blame it will be their designers probably. The exception to this would be small one-person type outfits but those are mostly on substack these days rather than running their own site. Secondly Ars Technica works completely fine for me on Firefox. I say that as someone who exclusively uses firefox and only ever breaks out chrome to debug compatibility issues and I can't recall ever having a problem with Ars Technica. Are you saying it doesn't work for you?