diff -r 168cd3d19fef Lib/webbrowser.py
--- a/Lib/webbrowser.py	Mon Jul 21 21:40:55 2014 +0200
+++ b/Lib/webbrowser.py	Mon Jul 21 16:14:10 2014 -0400
@@ -33,7 +33,8 @@
     for browser in alternatives:
         if '%s' in browser:
             # User gave us a command line, split it into name and args
-            browser = shlex.split(browser)
+            posix = (sys.platform[:3] != "win")
+            browser = shlex.split(browser, posix=posix)
             if browser[-1] == '&':
                 return BackgroundBrowser(browser[:-1])
             else: