I'm not sure what Firefox updated, but my Youtube downloaders have either had their on screen buttons disappear or act like there is no video to download. I just used them this morning, tried about 30 others and it's the same for all of them. I reinstalled the apps and restarted the computer with no luck. Anyone else having this problem?
The Kodi Youtube addon also stopped working. Youtube probably just updated their site, and the various third-party apps/scripts will need to update to the changes.
The youtube-dl cli also stopped working.
[https://github.com/ytdl-org/youtube-dl/issues/22367](https://github.com/ytdl-org/youtube-dl/issues/22367)
Youtube probably changed something.
New version of JDownloader works now. That was fast!
Uninstall then install the older version
https://www.techwalla.com/articles/how-to-reinstall-the-adobe-reader-plugin
https://ftp.mozilla.org/pub/firefox/releases/