Edge has an Internet Explorer mode, which is just running IE with Edge wrapped around it. They’re making it harder and harder to use, but they know there are big spenders that will just stop updating if they ever try to take away IE completely. Source: I work in Healthcare IT.
I believe the two squares immediately above and below the right 3 must be mines. Let me see if my reasoning makes sense: The 4 has five remaining squares around it, but three of those overlap with the 3 to its left. That 3 already has one mine marked, so those three squares that neighbor both it and the 4 can have at most two mines in them. That means the two squares that don’t overlap must both have mines.