Fix open_url_browser function which malfunctions on macOS under Python 3.9

[jefferyharrell]

On the Mac, under Python 3.9, the method call webbrowser.get().name fails with an OS-level error:

>>> import webbrowser
>>> webbrowser.get().name
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'MacOSXOSAScript' object has no attribute 'name'

This problem goes away under Python 3.11, but I think a better fix would be to remove the call entirely, as on the Mac it just returns "default" and on Windows it returns an empty string. So it's kind of pointless.

This PR removes the webbrowser.get().name call entirely and rewords the docstring and log message text to be generic. Now it works identically on macOS and Windows.

[twstagg]

Thanks! This is better since it respects the user preference by using open() instead of open_tab() as well.