[Solved] How to Fix Video DownloadHelper Not Working and Easily Download Videos Online

1. Update Firefox browser or overwrite the add-on

Check whether your Firefox browser has been updated to the latest version in time. In most cases, Video DownloadHelper not working issue is caused by the outdated Firefox browser version. But there was one exception, by default, Firefox will update your addons automatically but if you find the old Video DownloadHelper works perfectly on Firefox yet the new version causes lots of downloading trouble, you’re supposed to rewrite the current Video DownloadHelper version with an older one. Meanwhile, you can disable the auto-addon-update feature of Firefox to prevent recurrence.

Just follow the steps to disable the automatic update: Firefox > Addons > Click Setting icon > Uncheck update add-ons automatically