Only because Microsoft was asleep at the switch for years beforehand, allowing Firefox to establish a beachhead. Not long after Chrome launched and mobile phone

Only because Microsoft was asleep at the switch for years beforehand, allowing Firefox to establish a beachhead. Not long after Chrome launched and mobile phones grew in importance (~2010), Firefox was in steady decline. My argument is that short of ballots and anti-trust enforcement, nothing could have stood against three chokepoint-holding and well resourced competitors.