I have been a user of firefox for many years . BUT lately when I use firefox it will not let my PC (NUC6i5syh) go to sleep I don't want to say this but when I went to another browser today to test my theory's it worked and my PC would sleep. Hope you can help me with this problem. Kind regards. Alex.
Additional System Details
- Shockwave Flash 27.0 r0
- User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0
Are you sure the process/es keeping your CPU awake is/are connected to Firefox?
Maybe it won't go to sleep because it's running something in the background, such as a download operation.
Make sure to abort any task in progress and try it again.
Modified by mattcamp