The docstring states: "This option is currently ignored on MS-Windows, since the
necessary functionality is not available there."  However, this limitation was
removed in commit 20c6b227ea69b9cd47f92d1a7e0935312e8ce83c.

Patch attached.


Fix docstring of 'browse-url-firefox-new-window-is-tab'

* lisp/net/browse-url.el (browse-url-firefox-new-window-is-tab): Remove
obsolete remark from docstring (obsoleted by commit
20c6b227ea69b9cd47f92d1a7e0935312e8ce83c). (Bug#XXXXX)