My Firefox can't support HEVC
Good afternoon
recently i tried just realise my firefox can't played HEVC streaming video like twitch etc. (1st pictures)
i check on other browser such as Chrome, Edge, etc. it's played normal i check on google all about config
like media.wmf.hevc.enabled , media.hevc.enabled , dom.media.webcodecs.h265.enabled all set to true. checking on about:support i found it's not supported (2nd screenshot)
i check on Powershell are like this :
C:\WINDOWS\system32> Get-AppxPackage | Where-Object {$_.Name -like "*HEVC*"}
Name : Microsoft.HEVCVideoExtension
Publisher : CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US
Architecture : X64
ResourceId :
Version : 2.5.33.0
PackageFullName : Microsoft.HEVCVideoExtension_2.5.33.0_x64__8wekyb3d8bbwe
InstallLocation : C:\Program Files\WindowsApps\Microsoft.HEVCVideoExtension_2.5.33.0_x64__8wekyb3d8bbwe
IsFramework : False
PackageFamilyName : Microsoft.HEVCVideoExtension_8wekyb3d8bbwe
PublisherId : 8wekyb3d8bbwe
IsResourcePackage : False
IsBundle : False
IsDevelopmentMode : False
NonRemovable : False
IsPartiallyStaged : False
SignatureKind : Store
Status : Ok
Capabilities : inProcessMediaExtension,
uniqueAppPackageCapability
in summary it's installed and running.
i will be happy if you can guide me on how to enable it. because tbh Firefox are my daily drive
thanks before
All Replies (5)
For a full rundown on what is supported on your device type about:support in the URL.
It looks like you will have to look into the hardware option.
You forgot to attach your support troubleshoot log, esp. what's your Windows build.
See bugzil.la/hevc-windows-support for notes relevant to versions, e.g.: en.wikipedia.org/wiki/High_Efficiency_Video_Coding#:~:text=Notes%20%20,120 "Since Windows 11 version 22H2, the HEVC Video Extensions is built-in by default installation."
Firefox relies on the HEVC Video Extensions via the Windows Media Foundation. There's a note in https://codecguide.com/media_foundation_codecs.htm though:
"If you have a European N or Korean KN edition of Windows then you should also first install the Media Feature Pack from Microsoft to gain additional multimedia functionality. — You can recognize these special versions of Windows by the fact that they do no include Windows Media Player by default. — You can acquire this media package through Windows settings: Start > Settings > Apps > Apps & Features > Optional Features > Add a feature > Media Feature Pack"
So check also the Windows Media Foundation support and/or the Media Feature Pack presence.
amoun said
For a full rundown on what is supported on your device type about:support in the URL. It looks like you will have to look into the hardware option.
i tried post it but value more than 10000 characters which part should i look??
jbr said
You forgot to attach your support troubleshoot log, esp. what's your Windows build. See bugzil.la/hevc-windows-support for notes relevant to versions, e.g.: en.wikipedia.org/wiki/High_Efficiency_Video_Coding#:~:text=Notes%20%20,120 "Since Windows 11 version 22H2, the HEVC Video Extensions is built-in by default installation." Firefox relies on the HEVC Video Extensions via the Windows Media Foundation. There's a note in https://codecguide.com/media_foundation_codecs.htm though: "If you have a European N or Korean KN edition of Windows then you should also first install the Media Feature Pack from Microsoft to gain additional multimedia functionality. — You can recognize these special versions of Windows by the fact that they do no include Windows Media Player by default. — You can acquire this media package through Windows settings: Start > Settings > Apps > Apps & Features > Optional Features > Add a feature > Media Feature Pack" So check also the Windows Media Foundation support and/or the Media Feature Pack presence.
i try download on there but windows detect my system already on newer version. also my GPU are RTX3060 according to google it's should be OK to decoding HEVC
i'll try to type log below
Name: Firefox Version: 155.0.1 Build ID: 20260903215306 Distribution ID: Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:155.0) Gecko/20100101 Firefox/155.0 OS: Windows_NT 10.0 26200 Launcher Process: Enabled Multiprocess Windows: 1/1 Fission Windows: 1/1 Enabled by default Remote Processes: 20 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Found Safe Mode: false Memory Size (RAM): 15.1 GB Disk Space Available: 122 GB Pointing Devices: Mouse Crash Reports for the Last 3 Days Remote Features Remote Processes Type: RDD Count: 1 Type: Isolated Web Content Count: 7 Type: Preallocated Count: 3 Type: GPU Count: 1 Type: Extension Count: 1 Type: Socket Count: 1 Type: Privileged About Count: 1 Type: Isolated Service Worker Count: 1 Type: Utility Media Foundation Engine Count: 1 Type: Utility JavaScript Oracle Count: 1 Type: Utility Generic Audio Decoder Count: 1 Type: Utility Windows Media Foundation Count: 1
Add-ons Name: Activate Reader View Type: extension Version: 0.1.2 Enabled: true Location: app-profile ID: @activatereaderview
Name: Add-ons Search Detection Type: extension Version: 3.0.0 Enabled: true Location: app-builtin-addons ID: addons-search-detection@mozilla.com
Name: Chrome Remote Desktop Type: extension Version: 2.2 Enabled: true Location: app-profile ID: remotedesktop@google.com
Name: Form Autofill Type: extension Version: 1.0.1 Enabled: true Location: app-builtin-addons ID: formautofill@mozilla.org
Name: IDM Integration Module Type: extension Version: 6.43.1 Enabled: true Location: app-profile ID: mozilla_cc3@internetdownloadmanager.com
Name: IPP Activator Type: extension Version: 0.3 Enabled: true Location: app-builtin-addons ID: ipp-activator@mozilla.com
Name: New Tab Type: extension Version: 155.2.0 Enabled: true Location: app-builtin-addons ID: newtab@mozilla.org
Name: Old Twitter Layout (2026) Type: extension Version: 1.9.8 Enabled: true Location: app-profile ID: oldtwitter@dimden.dev-reupload
Name: Picture-In-Picture Type: extension Version: 1.0.0 Enabled: true Location: app-builtin-addons ID: pictureinpicture@mozilla.org
Name: Return YouTube Dislike Type: extension Version: 3.0.0.18 Enabled: true Location: app-profile ID: {762f9885-5a13-4abd-9c77-433dcd38b8fd}
Name: uBlock Origin Type: extension Version: 1.74.0 Enabled: true Location: app-profile ID: uBlock0@raymondhill.net
Name: Web Compatibility Interventions Type: extension Version: 155.5.0 Enabled: true Location: app-builtin-addons ID: webcompat@mozilla.org
Name: Language: English (US) Type: locale Version: 155.0.20260903.215306 Enabled: true Location: app-profile ID: langpack-en-US@firefox.mozilla.org
Name: Dark Type: theme Version: 1.3.4 Enabled: true Location: app-builtin ID: firefox-compact-dark@mozilla.org
Name: Firefox Alpenglow Type: theme Version: 1.5.3 Enabled: false Location: app-builtin ID: firefox-alpenglow@mozilla.org
Name: Light Type: theme Version: 1.3.4 Enabled: false Location: app-builtin ID: firefox-compact-light@mozilla.org
Name: System theme — auto Type: theme Version: 1.4.2 Enabled: false Location: app-builtin ID: default-theme@mozilla.org
Security Software Type: Microsoft Defender Antivirus Type: Type: Windows Firewall Legacy User Stylesheets
Active: false Stylesheets: No stylesheets found
Graphics Features Window Device Pixel Ratios: 1.25 Compositing: WebRender (Software) Font Visibility Debug Info: Windows Platform Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled; smooth pinch-zoom enabled WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. (Microsoft) EGL_VERSION: 1.5 (ANGLE 2.1 git hash: unknown hash) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_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_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_stream_producer_d3d_texture EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_CHROMIUM_sync_control EGL_EXT_pixel_format_float EGL_KHR_surfaceless_context EGL_ANGLE_display_texture_share_group EGL_ANGLE_display_semaphore_share_group EGL_ANGLE_create_context_client_arrays EGL_ANGLE_program_cache_control EGL_ANGLE_robust_resource_initialization EGL_ANGLE_create_context_extensions_enabled EGL_ANDROID_blob_cache EGL_ANDROID_recordable EGL_ANGLE_image_d3d11_texture EGL_ANGLE_create_context_backwards_compatible EGL_KHR_no_config_context EGL_KHR_create_context_no_error EGL_KHR_reusable_sync EGL_ANGLE_memory_usage_report EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_device_query EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_platform_angle_d3d11on12 EGL_ANGLE_platform_angle_d3d_luid EGL_ANGLE_platform_angle_device_id EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses EGL_KHR_debug EGL_ANGLE_feature_control EGL_ANGLE_no_error WebGL 1 Driver Renderer: Google Inc. 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