My videos play with right side blurred with lines or don't play at all, although they are loading and you can get a small image on the time line at the bottom of the video frame which is clear. This problem goes away in the safe mode of FF or with another browser. I have tried disabling my extensions and add ons one at a time and this does not fix the problem. There must be and add on or extension that does not appear in the list that is causing the problem and it gets turned off in the safe mode. I have downloaded the 64 bit 52.3.0esr and applied it to no avail.