Microsoft now is doing the same with Edge. If you want to change your default browser on Windows 11 you need to individually click and select it for every file extension/protocol.
I just tried this, there's a "make XYZ your default browser" button at the very top of the page, which changes the default for most of the relevant file extensions. Some, like MHT, it doesn't. Not sure why. But they have everything on one page, so for the extensions it missed, you can easily change.
That seems about as simple as one could make it. Is your concern that it didn't change every extension to whichever browser you made the default?
That seems about as simple as one could make it. Is your concern that it didn't change every extension to whichever browser you made the default?