Vivaldi fails to start

Certain configurations may be necessary given certain system parameters.

Even if you ‘refuse’ to “need typing specific command-line parameters for starting your browser”, you may have things you need to put in place, or maybe as a troubleshooting step you could ascertain your current options or try new ones.

For example … as mentioned … wayland.

And look - you are using wayland.

Example of other chromium based browser … in this one brave;

Or here on the forums, as was already linked above;

Since you are on wayland you probably should set the wayland flags.
Or the other way around and force it to run on X11 using … the X11 flags.
Both can be set in the GUI and/or permanently.
But its still important.