I currently am using Nightly and running Windows 10 on a dual monitor setup. I switched to it after it was suggested to me by this forum to resolve an issue that all my browser windows were opening in one monitor on reboot and restore. Nightly did indeed resolve that. Because of the type of research I do, I may at any time have a hundred or more browser windows open with multiple tabs in each. When I was running regular Firefox, I would have to reboot every third day or so when my computer would start to bog down. The browsers would get slow to respond or stop responding. Since switching to Nightly, I have found that I sometimes have to reboot multiple times a day with even less browser windows active. I know Nightly is beta and has many updates required often. Should I move back to Firefox? Has Firefox resolved the issue with all windows being opened in a single monitor? Are their any settings, third party add ons, etc that can prevent my computer from bogging down (something that keeps the browser from using resources even when a particular window isn't in focus).