Ask the Mozilla WWW browser to load URL.
Default to the URL around or before point. The strings in variable
`browse-url-mozilla-arguments' are also passed to Mozilla.
When called interactively, if variable `browse-url-new-window-flag' is
non-nil, load the document in a new Mozilla window, otherwise use a
random existing one. A non-nil interactive prefix argument reverses
the effect of `browse-url-new-window-flag'.
If `browse-url-mozilla-new-window-is-tab' is non-nil, then whenever a
document would otherwise be loaded in a new window, it is loaded in a
new tab in an existing window instead.
When called non-interactively, optional second argument NEW-WINDOW is
used instead of `browse-url-new-window-flag'.
(fn URL &optional NEW-WINDOW)