> They should switch to Firefox or Safari.

There seems to be a disconnect here. You can tell people they should do something all you want, but if they've already shown themselves unable or unwilling to do so, you're better off putting that effort into something that might actually achieve something.

Are you assuming that the user is on Windows? In that case, Safari is not an option (Apple stopped working on Safari for Windows ages ago), nor is the Linux package manager an option (the closest option is Chocolatey, but most people don't use that). Since we're discussing Edge, it's probably safe to assume that they're running Windows.

Or are you assuming that they're running a Mac? In that case, the Linux package manager still isn't an option, and we're kind of off-topic because the original post was about Windows and its default web browser.

Or are you assuming that they're running Linux? In that case, you can't get Safari, nor can you get Edge, and you're probably running Firefox or Ungoogled Chromium already by default. So what's the problem?