Set privacy.resistFingerprinting to false and the addon work again or use the dev version 4.5.5564beta, the issue is fixed. :)

Muy bueno!!!

elle permet d exécuter des scripts pour mon jeux

Recent Changes
4.5.5553
Update JSHint to 2.9.5
Firefox:
Disable anonymous statistics at stable versions by default

Oh my... THANK YOU SO MUCH, good decision, waiting for the update :)

hhjjj

Ok ottimo per dailymotion

Though am just learning user scripts, but am sure it is AWESOME !!

配合哔度使用

非常好用，可以用来使用脚本

allows to modify website content on the fly using user scripts. works perfectly and it's fully FF57+ compatible.