Somehow I managed to miss this story from November last year - Microsoft's Edge browser is coming to Linux (https://itsfoss.com/microsoft-edge-linux/). On Windows, I find that Edge sucked the first time I used and sucked the last time I used it. I found it unstable, slow and would just randomly freeze for not particular reason. So I don't think this is a big deal other than that Microsoft thinks enough people use Linux that it's worth making a browser for them, even if it's just to make advertising revenue. It probably won't be hard for them either now that Edge shares the same engine with Chromium/Chrome.