As long as your local names aren't changing all the time, an easy way is to create a keyword in your Firefox bookmarks, for each local host. That's specifically a keyword, not a tag. You can edit them in the Manage Bookmarks screen.

One nice feature of this is you can give a more complete URL for each keyword, for instance typing "nas" could link to "https://192.168.0.4:8181" with an IP and port number. It's instantly fast, and doesn't rely on a functioning DNS server.