To Firefox, sure. But if you're on Windows and your preferred alternative is Chrome you really might as well stay with Edge and benefit from the integration into Microsoft's ecosystem. Either way your data is being harvested.
I remember that nightmare vividly, my old company was using that piece of absolute garbage up until 2017 or so, until all the critical crap that had it as a hard requirement was replaced.
Indeed. I did web development at the time and I distinctly remember nightmares of doing things by the book and then having to spend 30% more time to make the whole thing work on IE. Sometimes you had to address IE6 and 7 separately. No amount of Microsoft PR these days can't save them from hatred I have accumulated back then.