This is a simple application that will allow you to open XML files in Firefox. You can use your own favorite file browser or the built-in browser that will show you only XML files and directories on your file system. If you''re using the built-in browser, just click the file to open it. If you''re using your own separate browser, click the file, and then select "XML Viewer" from the list of options presented. If you don''t already have Firefox installed, you''ll be prompted to download it. Firefox has a good XML viewer built-in. This does nothing but pass through an "open XML file" request to it. That''s it.