Lifehacker: How to Use Firefox’s Killer New Screenshot Tool. “If you’re not taking screenshots of your computer screen much, remembering which key combos to hit might be more confusing than convenient. If you hate keyboard shortcuts, Mozilla’s new Firefox Quantum browser makes it incredibly easy to capture what’s on your screen thanks to its built in Firefox Screenshots service. It syncs wherever you use the new browser, and is smart enough to help you figure out what you’re actually trying to capture.” The “take a screenshot of an entire Web page including what’s not visible on the screen” sounds great to me. I know there are extensions which can do that but I don’t like using browser addons unless I absolutely have to.