YouTube queue/playlist links export per Zauberfisch

Simple addon which adds a button to export/copy video links from a YouTube Queue/Playlist to clipboard.
This addon has been created with minimal effort and zero quality control and may or may not work as described.

Known limitations:
- only exports 200/400 links. (This plugin just reads the playlist box to export the links. If you click on VIdeo 200, it will export Videos 1-400. If you click on Video 400 it will export Videos 200-600)

Please report any bugs/feature requests at https://github.com/Zauberfisch/firefox-youtube-links-export/issues