Video Helper For Firefox
Video Downloadhelper For Firefox
Video Download Helper Addon For Firefox
Download Video Helper For Firefox
Video Helper For Firefox

This article describes what to do when you can't hear sound in Firefox.

To allow autoplay of media with sound, see Allow or block media autoplay in Firefox.

Video DownloadHelper is an intuitive Mozilla Firefox extension, which allows you to control the file download, from various websites. The add-on mainly facilitates the extraction of pictures.
Video DownloadHelper FireFox not working is the most common issue you may come across. When you download a video on FireFox browser, Video DownloadHelper can’t detect the video source or it fails to work. The issue is related to many factors so you can check out the following fixes based on specific conditions.

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Open Firefox and play content that should play sound, such as this Firefox video or a Flash video with sound.
ClickRight-click the volume icon in the Windows taskbar.
Click MixerOpen Volume Mixer. The Volume Mixer window will appear.
Make sure the slider for Mozilla Firefox (and Plugin Container for Firefox, for Adobe Flash plugin content) is not muted or at the bottom.

Make sure that the audio device (such as speakers or headphones) are turned on and connected to the computer properly.

Video DownloadHelper is an extension for the Firefox web browser and Chrome web browser.It allows the user to download videos from sites that stream videos through HTTP.The extension was developed by Michel Gutierrez.

Check out whether other applications on your computer can play sounds. If they can't:

Follow Microsoft's Fix sound problems tutorial.

If Firefox is the only application that you can't hear sound in: Robert heinlein ebooks.

Try the solutions in Fix common audio and video issues.

Make sure other applications on your computer can play sounds. If Firefox is the only application that you can't hear sounds in:

Video Helper For Firefox

Video Downloadhelper For Firefox

Try the solutions in Fix common audio and video issues.

If no application can play sounds:

See Apple's Troubleshooting issues with no audio from built-in speakers on Macs.
If you have an external audio device, check whether it's turned on and connected properly.

Make sure other applications on your computer can play sounds. If Firefox is the only application that doesn't play sounds:

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Video Download Helper Addon For Firefox

Try the solutions in Fix common audio and video issues.

Download Video Helper For Firefox

If you can't hear sounds in any other applications:

Video Helper For Firefox

Make sure that the audio device (such as speakers or headphones) are turned on and connected to the computer properly.