For some reason when a page is loading in Firefox, it doesn’t seem to respond to user interaction immediately. For example, say you’re loading a very long page (maybe you’re using a free Backpack account), and you know that the content you need is half way down the page. By default, Firefox will ignore user interaction in favor of giving all processing power to page rendering.
It may well be that Firefox’s engineers made this decision for a very good reason, but what if it bugs you that Firefox ignores you when you know exactly what you want to be doing? Well, it turns out there’s a hidden setting in Firefox that will allow you to bend it to your will.