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Showing content from https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox below:

HTML5 audio and video in Firefox

Firefox handles many types of audio and video content on web pages, and can also open links to MP3 files and some other types of media. This article explains which media formats you can play and how to control, save, and open them.

Since the use of certain audio and video file types is restricted by patents, a third-party application is required to use them. Firefox, however, is able to play natively open media and some types of patented media.

Firefox can play the WAV container format (.wav, .wave file types) containing uncompressed audio in PCM at 8 or 16 bits per sample.

Vorbis audio, Opus audio, Theora video and VP8 video are free audio/video compression formats for use without patent restrictions. They can be viewed in Firefox if they are embedded in the following container formats: Ogg (.ogg, .oga, .ogv, .ogx, .spx, .opus file types) or WebM (.webm file type).

Firefox also supports FLAC (Free Lossless Audio Codec) playback (.flac file type) and MP3 playback (.mp3 file type).

Firefox supports WebM/VP9 video on systems that don't support MP4/H.264.

Tip: In order to test your system, some sample video files are available in the HTML5 Video Test Page at tekeye.uk.

When you follow a link to open a supported audio or video file in Firefox or when you visit a website that includes supported media, you will see controls for managing playback. Controls for video will appear when you hold the mouse pointer over the media on the page.

The context menu (accessible via right-clickCtrl-click) includes the above controls except the sliders, and also let you:

• Accelerate or reduce the playback rate: Select and then one of the available speeds.
• Play video over and over: Select so that the video will play over and over automatically.
• Hide controls: Select so that the bottom control bar never show up. To show them, select .

After you click the media on a web page, to give it focus, you can control the playback with your keyboard.

To save an audio file from a web page to your computer:

1. Right-clickHold down the Control key while you click the audio controls and select
2. Select a location on your computer to save the file.

To save a video file from a web page to your computer:

1. Right-clickHold down the Control key while you click the video controls and select
   • Select if you only want to save the video snapshot.
2. Select a location on your computer to save the file.

The media files you save from web pages may not play in your normal media player. To open these types of files:

1. Open Firefox.
2. Click Ctrl + OCommand + O.
3. Navigate to the folder that contains the file you want to play, select the file, and click Open.

If you are having problems with audio or video files, see:

• Fix common audio and video issues
• What to do if Firefox won't play any sounds

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