You have a fully functioning tool. The icon will turn blue when it detects a video. Click it, choose the quality, and download. When the "Pro" popup appears, ignore it or click "Later."
For a long time, Video DownloadHelper was completely free. However, as web technologies evolved and browsers like Firefox changed their extension architecture (moving to WebExtensions), the developers had to adapt. video downloadhelper firefox license key
: It is a perpetual "lifetime" license with no recurring costs. Watermark Removal You have a fully functioning tool