Firefox beat IE because Microsoft development of the browser stagnated and Windows + IE were struck with a string of massive security vulnerabilities. Firefox w

Firefox beat IE because Microsoft development of the browser stagnated and Windows + IE were struck with a string of massive security vulnerabilities. Firefox was a more featureful, secure, compliant browser out of the box. Non-technical people were tricked into adding search bars and add-ons to IE that massively degraded performance, perhaps some malicious. Pretty easy to instruct the least technical person you know to click on Firefox and the problems go away. That is absolutely nothing like the environment that Firefox operates in, today. IE was irrelevant to Microsoft's business and revenue. Chrome was (and still is) a core aspect to Google owning search, which underwrites everything else it does. Even with limitless resources, there is nothing Mozilla could do to make Firefox so much better that it would regain market share against Chrome. And Firefox's primary competitor's enterprise is highly dependent on being in the driver seat, so that isn't going to change. Firefox is a great browser, and some people may independently decide to use it. But at this point, if you aren't using Chrome or Edge, it's probably because you have been on Firefox since 2005 and see no point in switching, or because you are making an ideological statement against Google (for privacy, or against web engine monopoly).