Recently on my little brother's Windows 8.1 computer I look in reliability monitor to see if anything happened and for the past week every few days I see plugin-container.exe stopped working. I inquire and he says he didn't notice anything crashed or whatever, and said Firefox didn't freeze or anything. In reliability monitor I went to more details and it says the module path was Unity player or something. I'll get on the computer and give more info if needed. And went to crash reports but the last report was from October 31st, nothing on the supposed plugin container crashes that occurred Wednesday, Friday, and today. They play a game called Roblox, but I don't know if that uses plugin container. It seems after updating Adobe Flash to the latest back on October 23rd is when these started, and Firefox is up to date with v42. I saw them occur sometimes, but never so frequently as they are occurring now. What can be causing this to appear in reliability monitor? I don't use the computer so don't know exactly what occurred, but like I said, my brother told me nothing froze or crashed at the time these occurred.