I almost never use Chrome-based browsers, but recently was forced because debug points were simply not working on Firefox. You can strawman all you want, there are unfortunately technical points where Google is abusing its position to force its standards, but the primary architects of Firefox downfall is Mozilla.

For the record, I used a Firefox phone for many years (and yes it did cause me a lot of problems), and remember vividly when they announced a luxury Firefox phone about one week before killing the project.