Use :Browse to open URL if available

I don't know of a browse, but if I ever make a browser interface plugin,
you better believe it'll be part of it.

Author: tpope

autoload/rails.vim

@@ -1426,7 +1426,9 @@ call s:add_methods('app', ['rake_command'])
 
 function! s:initOpenURL()
   if !exists(":OpenURL") == 2
-    if has("gui_mac") || has("gui_macvim") || exists("$SECURITYSESSIONID")
+    if exists(":Browse") == 2
+      command -bar -nargs=1 OpenURL :Browse <args>
+    elseif has("gui_mac") || has("gui_macvim") || exists("$SECURITYSESSIONID")
       command -bar -nargs=1 OpenURL :!open <args>
     elseif has("gui_win32")
       command -bar -nargs=1 OpenURL :!start cmd /cstart /b <args>