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?
Heck even Google couldn’t do it, they used Apple’s WebKit. And even Apple couldn’t do it, they used KDE’s KHTML. Speaking of KHTML: Konqueror is still around, though they’ve already decided to get rid of KHTML completely and move to one of the forks, development pretty much stalled since 2016.