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Videos, sound, pictures and animations don't work

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Support will end for all NPAPI plugins except for Flash in March 2017, when Firefox version 52 is released. See this compatibility document and this article for details. Beginning with Firefox version 52, support has ended for all NPAPI plugins except for Adobe Flash. See this
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Sometimes, the video or audio content in a web page cannot be properly downloaded and displayed in Firefox. A required plugin may be missing, outdated, blocked, in conflict with another plugin or extension, or the content may be blocked for some reason. This article will help you
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This article only applies to Firefox on Windows Vista and above. Important: This article does not apply to the 64-bit version of Firefox available for 64-bit operating systems on Windows 7 and above. Mozilla has its own "NPAPI plugin sandbox" security feature for 64-bit Firefox,
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If you are experiencing difficulty downloading or viewing images through Firefox, follow the troubleshooting instructions below. This article applies to: Still image file formats such as PNG, GIF, and JPG Animated file formats like animated GIF This article does not apply to the
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Support will end for all NPAPI plugins except for Flash in March 2017, when Firefox version 52 is released. See this compatibility document and this article for details. Beginning with Firefox version 52, support has ended for all NPAPI plugins except for Adobe Flash. See this
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Add-ons (extensions, themes, and plugins) that violate Mozilla's add-on guidelines are put on a "blocklist". Table of Contents1 What does the blocklist do?1.1 Disables unsafe add-ons1.2 Blocks unsafe add-ons from being installed1.3 Prevents plugins from running automatically2
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This article describes what to do when you can't hear sound in Firefox. If you want Firefox to make a "click" sound effect when you click on a link, and to use other small sound effects when you browse web pages, try the Navigational Sounds extension. Table of Contents1
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If you are able to view Flash videos but you are unable to view them if you try to make them full screen, then you may have a problem with the Flash player and your video drivers. This article describes how to work around this problem. If you are unable to view Flash content at
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Note: This article only applies to Windows. Note: This article doesn't apply to your version of Firefox. Some plugins that are no longer maintained, like the Windows Media plugin, have their files installed in a place that Firefox no longer supports. This causes the plugin to
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Note: This article only applies to Windows. Some HTML5 videos (especially Vine videos) won't play on Windows. You can quickly work around this issue by changing a Windows Media setting. In the address bar, type about:config and press EnterReturn. The about:config "This
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Some users with NVIDIA hardware may experience issues viewing stereo 3d content in fullscreen. We are actively working on a fix for this issue. Exit fullscreen to work around the issue At this point, the best workaround is to exit fullscreen and resize the window as close to fullscreen
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