MS switched to a Chromium base because they couldn't keep pace with Google's ever shifting web tech. Apple goes at its own pace, sometimes not implementing Goog

MS switched to a Chromium base because they couldn't keep pace with Google's ever shifting web tech. Apple goes at its own pace, sometimes not implementing Google's standards at all. Mozilla wants to have a say in how Google makes web standards. To do that effectively they need to keep up with Chrome. Admittedly even then Chrome's massive market share makes arguing against Google difficult. Apple sometimes joins the conversation but only when it directly affects something they're currently interested in.