[StevePerkins]

In 2005, Mozilla was more innovative than Microsoft. And more dedicated to implementing specifications that Microsoft was ignoring.

Today, the argument for Mozilla is that it's "almost as good" as other browsers. That it "doesn't have as many compatibility problems as you might have heard!", etc.

And they're not ahead of Google at implementing standards. They lag slightly behind. https://caniuse.com/#compare=firefox+81,chrome+87

If the Chromium team starts resting on its laurels like the IE team did in the early-2000's, then I hope they'll meet the same fate. But right now these situations are not remotely comparable.