The problem is that the server is sending a content type of "application/octet-stream" with the file, which generically identifies binary content that Firefox cannot display. (See screenshot.) As a workaround, you can prepend the URL with '''view-source:''' to show the file contents in a tab. One less-than-convenient way is: * Ctrl+click or right-click the link to direct it to a new tab * Cancel the download dialog * Type or paste '''view-source:''' at the beginning of the URL and press Enter to load it