1753090 - "Save as" on an mp3 link with redirection suggests unexpected name with *.mpga

Status: VERIFIED FIXED

(Core :: Audio/Video, defect, P3)

Description

[Ori Avtalion (salty-horse)]

Using latest Firefox Nightly on Linux.

Given this <a> element HTML:

data:text/html,<a href="https://www.buzzsprout.com/1004689/9960311-microsoft-wants-to-dominate-the-games-industry-w-rob-zacny.mp3">link to mp3</a>

Right clicking the element and choosing "Save link as" suggests saving it as this filename:

"ctfhm6l9wdjls1k3q4ypu5sdeqdi.mpga"

For comparison, the latest version of Chrome (97) suggests this filename:

"ctfhm6l9wdjls1k3q4ypu5sdeqdi.mp3"

But an older version (91) suggested

"9960311-microsoft-wants-to-dominate-the-games-industry-w-rob-zacny.mp3"

which makes more sense (Curiously, this better filename was only suggested when "Saving As..." an <audio> element, and not an <a> element).

When the URL doesn't end with an extension, and the mime type is "audio/mpeg", the suggested extension should be ".mp3" instead of the esoteric ".mpga".

And is there a reason why the suggested filename isn't based on the URL, like "9960311-microsoft-wants-to-dominate-the-games-industry-w-rob-zacny.mp3" ?

For further reference, the URL from above redirects to:

https://audio.buzzsprout.com/ctfhm6l9wdjls1k3q4ypu5sdeqdi?response-content-disposition=inline&

Which serves the file with these headers:

content-type: audio/mpeg
content-disposition: inline

Note the lack of "filename" in the content-disposition, so there's nothing that forces Firefox to suggest any particular filename.

Comment 1

[:Gijs (he/him)]

I expect this is another regression of bug 1704115. Over to the audio/video team for triage.

Comment 2

[Petruta Horea [:phorea], PTO until 8/22/25]

Reproduced on latest Nightly 98.0a1 2022-02-07 under Ubuntu 21.04 Wayland.
This issue reproduces back to Nightly 83.0a1 2020-10-14, so it's not a recent regression.

The .mp3 file downloaded using the builds before October 2020, has no extension.
This is the pushlog between no extension and .mpga extension: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d95aab08e480fc45205453c02d9941b7b9cc80e9&tochange=3a9fcbf00f37714e083b447a059ad543e50eee71

Comment 3

[Jeronimo17]

https://connect.mozilla.org/t5/discussions/audio-mpeg-saves-it-as-mpga-instead-of-mp3/td-p/9606

I thought the websites I used to visit had changed the file extension and then I realized it was Firefox.
Using Firefox 102.0.1 (64-bit) Linux Mint

Example:
https://cope-cdnmed.agilecontent.com/resources/mp3/9/9/1657390038099.mp3?download

I have to change the extension to mp3 to play it in my HW player.

Comment 4

[Monica Chiorean]

Issue reproduces on Ubuntu20.4 using Beta 103.0b8 (20220712185923) and Nightly 104.0a1(20220712215641).

• Save link as on link https://cope-cdnmed.agilecontent.com/resources/mp3/9/9/1657390038099.mp3?download saves as '1657390038099.mpga' on Ubuntu 20.4, '1657390038099' on Win10 and '1657390038099.mp3' on Mac 10.13.
• Save link as on link from description displays "ft-wants-to-dominate-the-games-industry-w-rob-zacny.mp3 link" on all 3 platforms Ubuntu 20.4, Mac10.13 and Win10.

Comment 5

[Jeronimo17]

(In reply to Monica Chiorean from comment #4)

Issue reproduces on Ubuntu20.4 using Beta 103.0b8 (20220712185923) and Nightly 104.0a1(20220712215641).

• Save link as on link https://cope-cdnmed.agilecontent.com/resources/mp3/9/9/1657390038099.mp3?download saves as '1657390038099.mpga' on Ubuntu 20.4, '1657390038099' on Win10 and '1657390038099.mp3' on Mac 10.13.
• Save link as on link from description displays "ft-wants-to-dominate-the-games-industry-w-rob-zacny.mp3 link" on all 3 platforms Ubuntu 20.4, Mac10.13 and Win10.

It looks like Windows has hidden the extension from you, in my case there doesn't seem to be a problem there.

Comment 6

[andreas.davour]

This is annoying as hell and I'd suggest this be bumped up to a higher priority.

Comment 7

[andreas.davour]

Bug existant in 103.0 and Ubuntu 20.04.4 LTS

Comment 8

[Jeronimo17]

Also on 103.0.1 (64-bit) Linux Mint 20.3

Comment 9

[Jeronimo17]

It seems that Firefox looks in Linux in this file for mime-type when there is no extension defined and we only rely on "content-type: audio/mpeg".

~ $ grep mp3 /etc/mime.types
audio/mpeg mpga mpega mp2 mp3 m4a

By modifying this line and starting with mp3, Firefox suggests mp3

Comment 10

[az [:az]]

Attachment: Bug 1753090 - Prohibit .mpga from being used as a primary extension for MIME type audio/mpeg.

Comment 11

[az [:az]]

Attachment: Bug 1753090 - Remove Linux-specific expectation for audio/mpeg -> .mpga mapping in test_filename_sanitize.js

Comment 12

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/af0ff2087244
https://hg.mozilla.org/integration/autoland/rev/91edf62d580a
Prohibit .mpga from being used as a primary extension for MIME type audio/mpeg. r=padenot
https://github.com/mozilla-firefox/firefox/commit/983794d3df44
https://hg.mozilla.org/integration/autoland/rev/cfaa2150e0c8
Remove Linux-specific expectation for audio/mpeg -> .mpga mapping in test_filename_sanitize.js r=padenot
https://github.com/mozilla-firefox/firefox/commit/6b6aef8ad696
https://hg.mozilla.org/integration/autoland/rev/1f51c01fe827
apply code formatting via Lando

Comment 13

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/91edf62d580a
https://hg.mozilla.org/mozilla-central/rev/cfaa2150e0c8
https://hg.mozilla.org/mozilla-central/rev/1f51c01fe827

Comment 14

[Monica Chiorean]

Reproduced the issue on Ubuntu24.04 using FF build 140.0a1(20250428211601).
Verified as fixed on Ubuntu24.04/Mac12.6/Win11 using FF builds 142.0a1 and 141.0b3.