browse-url-w3 is an interactive autoloaded compiled Lisp function in `browse-url.el'.

(browse-url-w3 URL &optional NEW-WINDOW)

Ask the w3 WWW browser to load URL.
Default to the URL around or before point.

When called interactively, if variable `browse-url-new-window-flag' is
non-nil, load the document in a new window. A non-nil interactive
prefix argument reverses the effect of `browse-url-new-window-flag'.

When called non-interactively, optional second argument NEW-WINDOW is
used instead of `browse-url-new-window-flag'.