I see there is already Stable, Beta, Developer Edition that actually uses the same version as Beta that can be confusing since it doesn't specify Developer Edition at all and uses same download package and then Nightly especially coming from who wants to have same Firefox browser after switching from Microsoft Edge and Google Chrome, but with separate programs that has different tabs and not to break up program session like only one window each, not multiple windows under the same program executable. Only Stable and Beta is available when it comes to Microsoft Store.
I would suggest to have more like different Firefox browser editions that works similar to Microsoft Edge Insider Channels like Stable, Beta, Dev and then Canary with different version numbers that makes more clear with different badges on taskbar icons to show which edition is used.