find latest version here.
this is idragonet's thread,author of [Easy DragToGo+],I made some modification.
[easy_dragtogo_smod-1.1.7.b21-fx-ja-sign.xpi] is japanese version of this one.
it works under e10s~but may still have some problem,Text can't drag in to input box,etc
Not capable for firefox FF57.