Unable to play MP3s hosted on Megaphone.fm

[Daikun]

Whenever I try to play a podcast that is hosted on Megaphone.fm, every audio file in the RSS feed is listed as having a file size of "0 bytes." When I try to click on it, I get the "Video format or MIME type is not supported" error message.

Here's a sample RSS feed: https://feeds.megaphone.fm/SBP1894546852

Likewise, when I try to do "Save Page As" while on the MP3 itself, it also loads an empty file with 0 bytes. However, when I try any other browser, the MP3s work just fine.
Other podcast hosts (i.e. Libsyn) will play MP3s just fine on PM, yet Megaphone specifically has this issue.

Any idea how to fix this conundrum?

EDIT:

Code: Select all

Application Basics
------------------

Name: Pale Moon
Version: 33.9.1 (64-bit)
Build ID: 20251016094139
Update Channel: release
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Goanna/6.8 Firefox/128.0 PaleMoon/33.9.1
OS: Windows_NT 10.0
CPU Capabilities: SSE2 AVX AVX2
Safe Mode: false

Extensions
----------

Name: Downloads Window
Version: 0.6.5
Enabled: true
ID: {a7213cf2-fa1e-4373-88ff-255d0abd3020}

Name: Grabit
Version: 33.1
Enabled: true
ID: {77485BDA-6FFE-5A73-B3ED-943F929C15AE}

Name: Greasemonkey for Pale Moon
Version: 3.31.4
Enabled: true
ID: greasemonkeyforpm@janekptacijarabaci

Name: Modify HTTP Response
Version: 1.3.8
Enabled: true
ID: modhresponse@Off.JustOff

Name: NewScrollbars (aka NoiaScrollbars)
Version: 1.2.8
Enabled: true
ID: NoiaScrollbars@ArisT2_Noia4dev

Name: PDF Viewer
Version: 2.3.240
Enabled: true
ID: pdf.js-seamonkey@lakora.us

Name: uBlock Origin
Version: 1.16.6.1
Enabled: true
ID: uBlock0@raymondhill.net

Graphics
--------

Features
Compositing: Direct3D 11
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Asynchronous Pan/Zoom: none
WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. (adapter LUID: 000000000000f036) EGL_VERSION: 1.4 (ANGLE 2.1.0.) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture_nv12 EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses
WebGL 1 Driver Renderer: Google Inc. -- ANGLE (NVIDIA GeForce RTX 5070 Ti Direct3D11 vs_5_0 ps_5_0)
WebGL 1 Driver Version: OpenGL ES 2.0 (ANGLE 2.1.0.)
WebGL 1 Driver Extensions: GL_OES_element_index_uint GL_OES_packed_depth_stencil GL_OES_get_program_binary GL_OES_rgb8_rgba8 GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_NV_pixel_buffer_object GL_OES_mapbuffer GL_EXT_map_buffer_range GL_EXT_color_buffer_half_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_float GL_OES_texture_float_linear GL_EXT_texture_rg GL_EXT_texture_compression_dxt1 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_OES_compressed_ETC1_RGB8_texture GL_EXT_sRGB GL_ANGLE_depth_texture GL_OES_depth32 GL_EXT_texture_storage GL_OES_texture_npot GL_EXT_draw_buffers GL_EXT_texture_filter_anisotropic GL_EXT_occlusion_query_boolean GL_NV_fence GL_EXT_disjoint_timer_query GL_EXT_robustness GL_EXT_blend_minmax GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_OES_standard_derivatives GL_EXT_shader_texture_lod GL_EXT_frag_depth GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_EXT_discard_framebuffer GL_EXT_debug_marker GL_OES_EGL_image GL_OES_EGL_image_external GL_NV_EGL_stream_consumer_external GL_EXT_unpack_subimage GL_NV_pack_subimage GL_OES_vertex_array_object GL_KHR_debug GL_ANGLE_lossy_etc_decode GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_sync_query GL_CHROMIUM_copy_texture
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug_get OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_etc1 WEBGL_compressed_texture_s3tc WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc MOZ_WEBGL_depth_texture
WebGL 2 Driver WSI Info: EGL_VENDOR: Google Inc. (adapter LUID: 000000000000f036) EGL_VERSION: 1.4 (ANGLE 2.1.0.) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture_nv12 EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses
WebGL 2 Driver Renderer: Google Inc. -- ANGLE (NVIDIA GeForce RTX 5070 Ti Direct3D11 vs_5_0 ps_5_0)
WebGL 2 Driver Version: OpenGL ES 3.0 (ANGLE 2.1.0.)
WebGL 2 Driver Extensions: GL_OES_element_index_uint GL_OES_packed_depth_stencil GL_OES_get_program_binary GL_OES_rgb8_rgba8 GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_NV_pixel_buffer_object GL_OES_mapbuffer GL_EXT_map_buffer_range GL_EXT_color_buffer_half_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_float GL_OES_texture_float_linear GL_EXT_texture_rg GL_EXT_texture_compression_dxt1 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_OES_compressed_ETC1_RGB8_texture GL_EXT_sRGB GL_ANGLE_depth_texture GL_OES_depth32 GL_EXT_texture_storage GL_OES_texture_npot GL_EXT_draw_buffers GL_EXT_texture_filter_anisotropic GL_EXT_occlusion_query_boolean GL_NV_fence GL_EXT_disjoint_timer_query GL_EXT_robustness GL_EXT_blend_minmax GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_OES_standard_derivatives GL_EXT_shader_texture_lod GL_EXT_frag_depth GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_EXT_discard_framebuffer GL_EXT_debug_marker GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_image_external_essl3 GL_NV_EGL_stream_consumer_external GL_EXT_unpack_subimage GL_NV_pack_subimage GL_EXT_color_buffer_float GL_OES_vertex_array_object GL_KHR_debug GL_ANGLE_lossy_etc_decode GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_sync_query GL_CHROMIUM_copy_texture GL_EXT_texture_norm16
WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug_get OES_texture_float_linear WEBGL_compressed_texture_etc WEBGL_compressed_texture_etc1 WEBGL_compressed_texture_s3tc WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc
Hardware H264 Decoding: Yes; Using D3D11 API
Audio Backend: wasapi
Direct2D: true
DirectWrite: true (10.0.26100.7019)
GPU #1
Active: Yes
Description: NVIDIA GeForce RTX 5070 Ti
Vendor ID: 0x10de
Device ID: 0x2c05
Driver Version: 32.0.15.7688
Driver Date: 6-24-2025
Drivers: C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumdx.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumdx.dll C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumd.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumd.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumd.dll,C:\Windows\System32\DriverStore\FileRepository\nv_dispig.inf_amd64_74b0ab655986054e\nvldumd.dll
Subsys ID: 144d196e
RAM: 16303

Diagnostics
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo





Important Modified Preferences
------------------------------

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.download.folderList: 0
browser.download.importedFromSqlite: true
browser.places.smartBookmarksVersion: 4
browser.search.openintab: true
browser.search.useDBForOrder: true
browser.startup.homepage: https://www.isitdownrightnow.com/
browser.startup.homepage_override.buildID: 20251016094139
browser.startup.homepage_override.mstone: 6.8.0
browser.tabs.warnOnClose: false
browser.tabs.warnOnCloseOtherTabs: false
browser.tabs.warnOnOpen: false
browser.urlbar.autocomplete.enabled: false
browser.urlbar.suggest.bookmark: false
browser.urlbar.suggest.history: false
browser.urlbar.suggest.openpage: false
extensions.lastAppVersion: 33.9.1
font.internaluseonly.changed: false
general.useragent.updates.lastupdated: 1763431712804
gfx.crash-guard.d3d11layers.appVersion: 33.9.1
gfx.crash-guard.d3d11layers.deviceID: 0x2c05
gfx.crash-guard.d3d11layers.driverVersion: 32.0.15.7688
gfx.crash-guard.d3d11layers.feature-d2d: true
gfx.crash-guard.d3d11layers.feature-d3d11: true
gfx.crash-guard.status.d3d11layers: 2
gfx.crash-guard.status.d3d11video: 2
media.hardware-video-decoding.failed: false
network.cookie.prefsMigrated: true
places.database.lastMaintenance: 1763171809
places.history.enabled: false
places.history.expiration.transient_current_max_pages: 122334
privacy.sanitize.migrateFx3Prefs: true
services.sync.declinedEngines:
services.sync.engine.greasemonkey: true
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1763171809
ui.osk.debug.keyboardDisplayReason: IKPOS: Touch screen not found.

Important Locked Preferences
----------------------------

Places Database
---------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 1

Library Versions
----------------

NSPR
Expected minimum version: 4.35
Version in use: 4.35

NSS
Expected minimum version: 3.90.7.2
Version in use: 3.90.7.2

NSSSMIME
Expected minimum version: 3.90.7.2
Version in use: 3.90.7.2

NSSSSL
Expected minimum version: 3.90.7.2
Version in use: 3.90.7.2

NSSUTIL
Expected minimum version: 3.90.7.1
Version in use: 3.90.7.1

[moonbat]

You've made 475 posts so far so you're not exactly a newcomer, and still don't bother to add any troubleshooting info in the template that's right there in the new post textbox?
Any MP3 from the sample link plays and gets saved fine here.

[Daikun]

You've made 475 posts so far so you're not exactly a newcomer, and still don't bother to add any troubleshooting info in the template that's right there in the new post textbox?

Most other people in this forum ignore it when they post. Why are you singling me out?
Also, why do you have to be a jerk about it?

[Moonchild]

Why are you singling me out?

You're not being singled out. Anyone with a decent amount of time under their belt should know what info we need to be able to help you. And we get on people's cases all the time about it when they ignore it. We do, however, have a bit more flexibility for new users who might not be familiar with how we tend to work here. You aren't.
In fact, the response given is expected and is actually treating you like everyone else, so the antithesis of being singled out

If you want us to help you, you have to help us help you. We can't know your environment if you don't show us. "I already posted it x times/x time ago" also doesn't help because configurations change.
The template is there for a reason, I put time and effort into setting that up. Please don't ignore it.

[Moonchild]

The feed works just fine. it shows 0 bytes because it's not a direct link, but when clicked it will open it.
Why is this? Because it hops through no less than 5 redirects on different domains before it actually plays.

If that doesn't work for you, it may be because you are using certain extensions, settings or what not; which we can't help you with if we don't have the information needed, further underlining why we ask for it from anyone.

[Daikun]

I went back and edited my post to include the Error Console message.

[moonbat]

We asked you for troubleshooting info, not the error console output. They're different things.

[Daikun]

We asked you for troubleshooting info, not the error console output. They're different things.

Okay, because when I start a new thread here, it explicitly states this:

Please try to include any relevant output from the Toolkit Error Console or the Developer Tools Web Console using the following procedure:

I figured that's what I needed, but I guess not. Alright... (Also, trying the Web Console turned up blank.)
Anyway, I edited my post again. Hopefully, it's correct now?

[Night Wing]

FWIW, I clicked on five podcasts and they all played for me without any problems.

At this time I am using 64 bit linux Pale Moon (GTK2) 33.9.1 using 64 bit MX Linux 25 (Infinity) Xfce.

[Moonchild]

I figured that's what I needed, but I guess not.

Well, it was what is needed normally when reporting specific web compatibility issues, that is why it's in the template.
In this case though, (also) getting troubleshooting information was asked for.

Either way, looking at the info provided I'm thinking it may be one of your download helper extensions that's getting in the way. See if disabling either or both helps with your playback issue. Your preferences look ok, not seeing anything that would potentially interfere.

[therube]

Oddly ? for me, in both PM & FF, I get a "This XML file does not appear to have any style information associated with it. The document tree is shown below." message & the page is "source-like" (rather then laid out in an expected manner).
(SeaMonkey displays the page as expected, in a "feed-like" format.)

Code: Select all

<rss version="2.0">
<channel>
<atom:link href="https://feeds.megaphone.fm/SBP1894546852" rel="self" type="application/rss+xml"/>
<title>The Best Worst</title>
<link>https://sites.libsyn.com/570025</link>
<language>en-us</language>
<copyright>2025</copyright>
<description>
Welcome to Night Vale's Meg Bashwiner and Joseph Fink consider the Golden Age of Television, at its best and its worst. Each episode, we consider a classic show by watching first its worst IMDB user rated episode, and then its best. What can we learn by watching the best and worst of classic TV? Let's find out together.
</description>
<title>The Best Worst</title>
...
</content:encoded>
<itunes:duration>322</itunes:duration>
<guid isPermaLink="false">df2e86d8-c3e1-11f0-84f3-2fa8459b83eb</guid>
<enclosure url="https://www.podtrac.com/pts/redirect.mp3/pdst.fm/e/mgln.ai/e/495/chrt.fm/track/FGADCC/traffic.megaphone.fm/SBP5036718530.mp3" length="0" type="audio/mpeg"/>
</item>
<item>

And in there it has "duration" & also "length".
"duration" is close to expected length.
"length", which is what actually displays on the webpage is "0" in all cases (though does not impact anything except for lack of knowledge given to the user who may be reading the page).

Then the "links" to the mp3's, theydo roll-over (so are not a 1 to 1 direct link), & do play, as expected.


You could always test PM in Safe Mode, where if it works, would tend to point to an extension issue,
or you could test the page in a new, clean Profile, which is also likely to work, which then point you back to an "issue" with your existing Profile, causing things to not work as you want.

[Daikun]

Either way, looking at the info provided I'm thinking it may be one of your download helper extensions that's getting in the way. See if disabling either or both helps with your playback issue. Your preferences look ok, not seeing anything that would potentially interfere.

Wait... I have two? How? I should only have one (Grabit). Where are you seeing a second one?

[THX-1139]

It's working just fine for me...FWIW it does have a small mention at the start that it's using Irfanview to play, which I do have installed.

[Moonchild]

Either way, looking at the info provided I'm thinking it may be one of your download helper extensions that's getting in the way. See if disabling either or both helps with your playback issue. Your preferences look ok, not seeing anything that would potentially interfere.

Wait... I have two? How? I should only have one (Grabit). Where are you seeing a second one?

I was thinking "downloads window"? I don't know what it does specifically

[jobbautista9]

I've used that add-on before; it brings back the main downloads UI from Pale Moon 27, which is a window instead of a popup from the toolbar button.

[Moonchild]

Ah, yeah that makes sense. Probably not related then if it's just UI (although if it does use the toolkit downloading back-end there may be nuance differences).
Bottom line seems to be it does a 5-hop dance before adding an auth key to the URL that allows downloads; that kind of indirection would logically result in an "unknown" file size, and may possibly interfere with playback if things get stripped along the way resulting in the auth parameter not being generated or passed. (it seems to be an over-engineered "no hotlinking" countermeasure)

[Daikun]

I know it's been a while (I was really frustrated and just needed to step back from the problem for a while), but I'm still not any closer to my solution. I tried rebooting in Safe Mode and that made no difference.

Also, here's the Error Console info again, since editing my post is disabled after a certain period of time. I figured I could try and edit it back in to my OP, but I guess not. Oh, well.

Code: Select all

Timestamp: 11/26/2025 2:55:24 PM
Error: DEPRECATION WARNING: This path to Console.jsm is deprecated.  Please use Cu.import("resource://gre/modules/Console.jsm") to load this module.
You may find more details about this deprecation at: https://bugzil.la/912121
Callstack:
resource://gre/modules/devtools/Console.jsm 19 null
chrome://downloads_window/content/modules/watchwindows.jsm 47 null
resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///C:/Users/*****/AppData/Roaming/Moonchild%20Productions/Pale%20Moon/Profiles/5uaqxcu3.default/extensions/%7Ba7213cf2-fa1e-4373-88ff-255d0abd3020%7D.xpi!/bootstrap.js 144 startup
resource://gre/modules/addons/XPIProvider.jsm 4368 XPI_callBootstrapMethod
resource://gre/modules/addons/XPIProvider.jsm 2104 XPI_startup
resource://gre/modules/AddonManager.jsm 193 callProvider
resource://gre/modules/AddonManager.jsm 725 _startProvider
resource://gre/modules/AddonManager.jsm 861 startup
resource://gre/modules/AddonManager.jsm 2433 startup
jar:file:///C:/Program%20Files/Pale%20Moon/palemoon.res!/components/addonManager.js 58 observe

Source File: resource://gre/modules/Deprecated.jsm
Line: 85

[adoxa]

Those errors look to be coming from "Downloads Window". It also works fine for me (Basilisk, Win10). The "0 bytes" file size is what is reported, not much to be done about that. FWIW, here's a Modify HTTP Response filter to format it (use content:encoded as description) and add the duration (in seconds; don't see a way to convert it to minutes).

Code: Select all

[["feeds.megaphone.fm",["/SBP/",["/<p>To support[\\s\\S]*?duration>(\\d+)/g","<p>$1 seconds.</p>$&","/( {6}</?)content:encoded/g","$1description"]]]]

[frostknight]

You're not being singled out. Anyone with a decent amount of time under their belt should know what info we need to be able to help you. And we get on people's cases all the time about it when they ignore it. We do, however, have a bit more flexibility for new users who might not be familiar with how we tend to work here. You aren't.

I will be honest, I have done the same thing he has, so... idk if he is being singled out, but he isn't the only one who is guilty of what he is. I am too due to how confusing some of the info is to put down.

Likewise, when I try to do "Save Page As" while on the MP3 itself, it also loads an empty file with 0 bytes. However, when I try any other browser, the MP3s work just fine.
Other podcast hosts (i.e. Libsyn) will play MP3s just fine on PM, yet Megaphone specifically has this issue.

This being said, I see 0 byte stuff on the whole page to. The best solution?

you should click on the mp3 directly and download it from there by save page. I just did and it works.

[Daikun]

This being said, I see 0 byte stuff on the whole page to. The best solution?

you should click on the mp3 directly and download it from there by save page. I just did and it works.

Doesn't work for me.