https://bugzilla.redhat.com/show_bug.cgi?id=2257835
--- Comment #1 from Wahiduzzaman wahid.telco@gmail.com --- some additional information:
$ microsoft-edge [9909:9909:0111/114918.751986:ERROR:process_singleton_posix.cc(359)] This profile appears to be in use by another Microsoft Edge process (5394) on another computer (wahid-lenovo-f39). Microsoft Edge has locked this profile to prevent corruption. If you're sure no other processes are using this profile, you can unlock it and relaunch Microsoft Edge. [9909:9909:0111/114918.752045:ERROR:message_box_dialog.cc(147)] Unable to show a dialog outside the UI thread message loop: Microsoft Edge - This profile appears to be in use by another Microsoft Edge process (5394) on another computer (wahid-lenovo-f39). Microsoft Edge has locked this profile to prevent corruption. If you're sure no other processes are using this profile, you can unlock it and relaunch Microsoft Edge.
$ ls -lha ~/.config/microsoft-edge/
lrwxrwxrwx. 1 wahid wahid 20 Jan 9 16:34 SingletonCookie -> 14402078460303088143 lrwxrwxrwx. 1 wahid wahid 21 Jan 9 16:34 SingletonLock -> wahid-lenovo-f39-5394 lrwxrwxrwx. 1 wahid wahid 47 Jan 9 16:34 SingletonSocket -> /tmp/.com.microsoft.Edge.DEm21N/SingletonSocket