Here’s an example of a user loss scenario caused by this.
1.) User Installs Launcher to Use Unreal Store again
2.) User is prompted to log in
3.) User selects google login
4.) Edge is opened instead of chrome where the user is already signed in
5.) Now needing to log into google on a new browser: User says, ‘nevermind’ and goes back to steam.
Literally happened to me tonight.