Add note for the web URL usability.

cyberduck/bookmarks.md

@@ -153,8 +153,11 @@ Example configuration:
 :width: 600px
 ```
 
+Web URLs are supported for [FTP](../protocols/ftp.md), [SFTP](../protocols/sftp/index.md) and [WebDAV](../protocols/webdav/index.md). 
+
 See also [Open or copy HTTP URL](browser.md#open-or-copy-http-url).
 
+
 ## Exporting Bookmarks
 
 Drag the bookmark from the Bookmark Drawer anywhere to the *Finder.app/ Explorer* (e.g. the Desktop). You can double-click the document in the file browser to open a new connection to the server specified in the bookmark. To back up all bookmarks, refer to [this FAQ entry](faq.md#preferences-and-application-support-files-location).