I feel the article misses how Firefox's inability to get a foothold on the mobile platform contributed to its decline. There are more people today using web browsers via mobile then desktop. In many poorer countries the first and only access to the open internet for the people is through chrome on Android. I don't blame Mozilla for this though since they did not have a monopoly on a platform to capitalize on unlike t…
Considering how poorly pretty much every vendor who wasn't named "Apple" was fumbling around trying to layer negative value added customizations on top of Android in the early days (and continued doing so for years), there was a ripe opportunity to ship a "Mozilla mobile" consisting of a stock Android device + Firefox. Of course, the powers that be predictably blew it.