Your currently installed addon script is outdated.
Please install the latest version to ensure smooth functionality.
Our Chrome, Firefoc, Opera und Safari Addon adds 3 Buttons (MP3, MP4 und Advanced) on the YouTube page where the video can be converted and downloaded.
This will allow you to use Convert4us even faster and easier.
Why does Tampermonkey have to be installed?
Tampermonkey makes it possible to upload and read data in web pages. Using Tampermonkey allows us to offer an addon script for all browsers, which saves us a lot of work and time.