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Downloading Audio Books from Audible

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  • Igcine ukuphendulwa ngu jscher2000

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When downloading my Audible Library via Firefox (latest update) tha downloaded fies in AAX format, are appearing in my Downloads Folder as .MP4 format. Convertion to MP3 works, but is messy. I`m informed by Audible Support that the fault lies with Mozzilla.! Regards, Tony Jackson

Isisombululo esikhethiwe

Well, there is a bug on file already (#1734606) so I'm not sure what else to suggest.

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Hi Tony, Firefox sometimes changes file extensions to match up with the content-type indicated by the server. If you change the file extension (without any conversion), you can test whether it is a renaming issue or something else. (You might need to set Windows to show all file extensions if you haven't already.)

Unfortunately, I can't find any built-in option to turn off the file extension renaming for media files (it can be turned off for non-media files such as documents).

There is a bug on file to look at this (#1734606), but any change is likely to come after the new year (Firefox 96 or later).

Until then... I have not been able to come up with any workarounds, but another support volunteer might have an idea.

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jscher2000 said

Hi Tony, Firefox sometimes changes file extensions to match up with the content-type indicated by the server.

Thanks for the insight, Jefferson. In the case of the Audible audiobook, the download request returns these headers for the audiobook file:

Content-Type: audio/vnd.audible.aax
Content-Disposition: attachment; filename=AliceInWonderland_ep7.aax


Since the `Content-Type` indicated by the server is a custom MIME type that is only ever used by Audible AAX files, it seems Firefox shouldn't be changing the extension to MP4. Did something change in Firefox 93 that remapped the AAX content type to a different extension?

Additionally, the server is returning a `Content-Disposition` header that is explicitly suggesting the ".aax" extension; according to the documentation for that header, user agents like Firefox should be respecting that suggested filename.

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Isisombululo Esikhethiwe

Well, there is a bug on file already (#1734606) so I'm not sure what else to suggest.

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Why is this marked solved. A bug report isn't a solution, is it?

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gilliam111 said

Why is this marked solved. A bug report isn't a solution, is it?

The person who submits the question decides whether it is solved.

Anyway, until the bug is fixed, you need to manually edit the file extension to .aax so that it will open with Audible.

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Are you certain this will work? I read on another question that manually editing the file extension doesn't solve the problem.

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gilliam111 said

Are you certain this will work? I read on another question that manually editing the file extension doesn't solve the problem.

After the file is saved with the wrong extension, you can edit it to the correct extension -- Firefox is not modifying the actual file. If you are on Windows, make sure all extensions are showing so you don't end up with a file name like file.aax.mp4 (due to a hidden mp4 extension). See:

https://www.bleepingcomputer.com/tutorials/how-to-show-file-extensions-in-windows/

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