There's no loop counter, but this addon works for me. On Youtube, playing a video, and right-clicking on the video shows a menu, where we can loop forever the vid.

YA NO SIRVE, ME DA: 500 Internal Server Error

Installs fake "Firefox update" scamware.
Do not want nor need scamware just to repeat a video.
Also tries to install a hijacker.

Use to be one of must have extension for your Mozilla, now become totally malware ads clicker.. very disappointed..

تحوي دعايات احتيالية مدفوعة
contain violated payments ads

Used to be good but no longer - too many videos can't be downloaded.

Gó*** nie działa, za to wyświetla reklamy kradnące dane!!!!!

Legal

100000

This is one of the best extension ever. The reason is because it has everything I needed and it worked really well and gave no problems. Two thumbs up!