Dezegar

When trying to run WebExtension on Firefox 58 (Beta), I get following:  It might not be too far from compatible, maybe(?). It would be great, if it worked for...

Might be useful to include these steps in a Readme of the project (main page in github)

Second this idea, or any other that allows exporting a UpNext playlist, as I had to note about 200 songs from my playlist, when I needed to wipe my harddrive....