If the solution above doesn't help you, you can try to clear your browser's cache, cookies, and search history.Then, select 'Add-ons' and go to 'Extension.' From there, click the 'Gear' icon at the upper right part of the extension page, and uncheck the 'Update add-ons automatically.' Go to settings by clicking the 'Menu' button beside the URL bar. You can try to disable the automatic on your Firefox browser.Sometimes, it's the new version download that causes this trouble. Though there are times that the older version of Video DownloadHelper works perfectly on Firefox. First, make sure that your Firefox browser is up to date.On the other hand, we have searched and listed the steps the best troubleshooting solution if you encounter Video DownloadHelper on your Mozilla Firefox browser. Since Video DownloadHelper is a web-based video download, you will need to clean your browser for you to download videos smoothly. You can also experience this problem if your Firefox browser is outdated or have a lot of cookies, cache, and search history. When Video DownloadHelper cannot detect the video source that you are trying to download, there are few things you can do. This problem is by far the most common issue that you may encounter along the way. How to Fix Video DownloadHelper Not Working in Firefox

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