As announced, Microsoft has now released its Edge Developer version for Insider (version 88) for Linux.
With this version you can test the Microsoft browser under Linux for the first time (.deb and .rpm Repos) .
In the next step there will be a beta channel version and then the public release.
you could download the Linux version.
Here the direct download of the repos:
P.S: Under Ubuntu you have to download the .deb download first and then start the software installation with a click. If you select "Open with software installation (default)" in the download question it will not work.
Have fun testing