Hi Joshua, Firefox sometimes needs to add a .zip file extension onto the end of a download file name, but it's strange that it gets changed from .story to .zip. Especially when the server is explicitly setting the file name:

content-type: application/zip content-disposition: fileName="SL360-SeekbarVideoTest.story"

(Same issue on a test link I set up: https://www.jeffersonscher.com/temp/story.php )

Although it doesn't solve the problem, you will have an easier time renaming the file when saving if you switch Firefox from saving automatically to asking you where to save downloads. That's on the Preferences page:

If you have some time, you could file a bug:

https://bugzilla.mozilla.org/home

Hi Joshua, if you would consider using an add-on for this, I have a suggestion.

I have an extension called Content-Type Fixer that checks the file extensions of downloads and lets you override the Content-Type. Here's how you would set that up for these files:

(1) Install the extension: https://addons.mozilla.org/firefox/addon/content-type-fixer/

(2) Click its Zzzz button to start it

(3) Trigger the download (you can cancel after you get the dialog)

(4) Click the toolbar button again to open the menu, then "Add/Edit Content Types (View Log)"

(5) Near the top of the log, find the problem download, and click its "Add" button

(6) I don't think there is an official MIME type for these files, so you can simply keep the suggested ficitious MIME type and click Save Content-Type

(7) Switch to your tab with the link and try the download again -- the dialog should look more like the attached image:

Success? That should continue while the extension is "awake" (if you need to go back to the built-in handling, you can disable the overriding from the menu or turn off the extension).