This is simply a wonderful add-on. It helps Gmail users make better use of our browser time by counting the number of minutes you spend gazing at your inbox and restricting that number, if you choose.
So happy this add-on is available in Firefox. I've tried a lot of services to hamper distractions. Inbox When Ready is a lifesaver when you need to use your gmail archive but still keep focused on the task at hand. Super helpful!
