A common complaint is a large appearing on downloaded videos. This is not a "bug" but a functional limitation of the free version. Video DownloadHelper Companion App not working in firefox
On systems like Ubuntu or Linux Mint , if Firefox is installed via Snap or Flatpak , the extension may struggle to "talk" to the CoApp due to sandbox restrictions. Running the command /opt/vdhcoapp/vdhcoapp install in the terminal often resolves detection issues. firefox download helper not working
Modern video formats often require the Video DownloadHelper Companion App to merge audio and video streams (HLS/M3U8). A common complaint is a large appearing on downloaded videos
The extension currently requires Firefox to "Remember History" to function correctly. You can check this in Settings > Privacy & Security > History . firefox download helper not working