Fix common audio and video issues

Sometimes, the video or audio content in a web page cannot be properly downloaded and displayed in Firefox. This article will help you solve these problems. Fix Firefox Error

Allow autoplay of media with sound

Firefox may be blocking media with sound from playing automatically. To allow media autoplay, see Allow or block media autoplay in Firefox.

HTML5 audio and video

Firefox has built in support for open media formats usually associated with MP3, WebM, Ogg and Wave containers. However, MP4 containers usually depend on platform decoders for AAC and H.264 audio and video streams. For more information, see Fix video and audio playback problems on Firefox for Windows and HTML5 audio and video in Firefox.

Clear the cache

See How to clear the Firefox cache.

Disable interfering extensions or ad-blocking software

Ad-blocking software, such as anti-banner filters of your Internet Security program, or extensions, such as Flashblock or Adblock Plus, can prevent audio or video content from playing.

  • If the site works with ad-blocking disabled, you may want to add the site to your whitelist in your adblocker filter.
  • If the video or audio plays when you disable all extensions, then one of your extensions was causing the problem. For more information, see Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.

Check some Firefox settings

  • Cookies:
  1. Click the menu button Fx57Menu and select Options.
  2. Select the Privacy & Security panel and go to the Cookies and Site Data section.
  3. Verify that cookies are enabled and that the site is not blocked in the Exceptions list.
  • History:
  1. Click the menu button Fx57Menu and select Options.
  2. Select the Privacy & Security panel and go to the History section.
  3. Make sure that Firefox is set to Remember history.
  • Pop-up windows:
  1. Click the menu button Fx57Menu and select Options.
  2. Select the Privacy & Security panel and go to the Permissions section.
  3. Allow the website as an exception to the "Block pop-up windows" setting.

Reset preferences

See Reset Firefox preferences to troubleshoot and fix problems.

Remove specific entries in the hosts file (advanced users)

If you use a hosts file, you can temporarily disable it by renaming it Xhosts. Or, you can edit the hosts file to remove specific entries such as  that can cause videos on certain sites to fail (for more information, see this MozillaZine forum thread). To apply changes to your hosts file, you may need to flush the DNS cache by entering the command: ipconfig /flushdns in the Run dialog box on Windows.


                     Call  1-856-514-8666 for help and support of Fix Firefox Error.



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