Article seems pretty flawed. Relevance is a vague metric, and the author relies pretty heavily on data related to government site visitation, which seems subject to bias toward certain types of users.
Market share is likely still incredibly low, but Firefox’s relevance should be spiking right now due to Google’s shenanigans with Chromium. The fact that like 90% of revenue for its for-profit wing is from Google is still troubling.
Any alternative views out there?
Keep it default until you encounter a website that doesn’t work. Then swap it temporarily either manually or with an extension. And then swap back immediately. Then send the webmaster a complaint.
I do that at home (not the webmaster bit), but at work I’m usually in a hurry and switching between different admin panels, so it’s constantly set to something that will work with ABM, intune, and MS admin (there are more admin panels, but those the ones always giving me the “your browser is not supported” bs). Not chrome, though.