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If Firefox has trouble playing video or music on a Windows computer, you can install the Media Feature Pack, if it's missing. Learn more.

{for mac,linux,winxp}{warning}This article applies to Windows Vista/7/8/8.1/10 users only.{/warning}{/for} Some versions of Windows are missing Windows Media Player and other media-related technologies needed to decode and play videos and music properly. Microsoft offers a ''Windows Media Feature Pack'' (for versions designated as Windows N and KN editions) and a ''Platform Update Supplement'' (for Windows Vista and Server 2008) that you can download to add this functionality. Here are some problems that people have reported when the Windows Media Feature Pack is missing: *"Why is YouTube video blurry, low resolution, or black?" *"Why do I get Flash instead of HTML video?" *"Why doesn't Vimeo work?" *"Why do I get a Netflix error that Microsoft Silverlight is required?" <!-- bug 1379161 --> =Solution= To resolve this, please download and install the Media Feature Pack or Platform Update Supplement that's appropriate for your version of Windows. {for win7,win8,win10} {note}Visit Microsoft's [http://windows.microsoft.com/windows/which-operating-system support article] to find your version of Windows.{/note} {/for} {warning}If you update Windows to a newer version, for example, from Windows 10 Version 1803 to Windows 10 Version 1809, you'll need to redownload and install the Media Feature Pack even though you installed it for the previous Windows version.{/warning} '''Windows 10''': *[https://www.microsoft.com/en-us/software-download/mediafeaturepack Media Feature Pack for N versions of Windows 10] ** Version 1903 – May 2019 (Microsoft Support article [https://support.microsoft.com/en-us/help/4475817 KB4475817]) ** Version 1809 – October 2018 (Microsoft Support article [https://support.microsoft.com/en-us/help/4134255 KB4134255]) ** Version 1803 – April 2018 (Microsoft Support article [https://support.microsoft.com/en-us/help/4057437 KB4057437]) ** Version 1709 - October 2017 (Microsoft Support article [https://support.microsoft.com/en-us/help/4039813 KB4039813]) *[https://support.microsoft.com/en-us/help/4016817/media-feature-pack-for-n-edition-of-windows-10-version-1703-april-2017 Media Feature Pack for N edition of Windows 10 Version 1703 (April 2017)] *[https://www.microsoft.com/en-us/download/details.aspx?id=53356 Windows 10 Version 1607 (Anniversary Update): N and KN editions] (Microsoft Support article [https://support.microsoft.com/en-us/kb/3133719 KB3133719]) *[https://www.microsoft.com/en-us/download/details.aspx?id=49919 Windows 10 Version 1511: N and KN editions] (Microsoft Support article [https://support.microsoft.com/en-us/kb/3099229 KB3099229]) '''Windows 8.1''': *[http://www.microsoft.com/download/details.aspx?id=42503 Windows 8.1: N and KN editions] (Microsoft Support article [https://support.microsoft.com/en-us/kb/2929699 KB2929699]) '''Windows 8''': *[http://www.microsoft.com/download/details.aspx?id=30685 Windows 8: N and KN editions] (Microsoft Support article [https://support.microsoft.com/en-us/kb/2703761 KB2703761]) '''Windows 7''': *[http://www.microsoft.com/download/details.aspx?id=16546 Windows 7: N and KN editions] (Microsoft Support article [https://support.microsoft.com/en-us/kb/968211 KB968211]) '''Windows Server 2008''': *[https://support.microsoft.com/en-us/kb/2117917 Platform Update Supplement for Windows Server 2008] <!-- L10n: consider using en-us until hang issue for local versions is resolved (bug 1225900)--> '''Windows Vista''': *[https://support.microsoft.com/en-us/kb/2117917 Platform Update Supplement for Windows Vista] <!-- L10n: consider using en-us until hang issue for local versions is resolved (bug 1225900) -->