Earlier quoted context omitted.
Edge and Brave are based on Chromium. While Brave would likely block this API for a while (until too many sites require it and it would hurt their market share) they don't block most changes that Google pushes into Chrome so are still largely contributing to Google's power over the Internet. So if you really want to disrupt Google's control over the web platform the only options are really Firefox and Safari.
Safari has far more weight here though people are loathe to admit it. Apple's market share is a direct check on Google's ability to push things through so easily. Firefox unfortunately does not have the numbers on their side nor will they seemingly risk their Google payout deal. At this point, if you're using it, you're doing it because it has specific features or extensions you want, or you believe that it's ethical…
On HN people are more likely to complain about Safari existing and demand Chrome everywhere.