There should be a way. A way = An option if enabled, this happens: The browser starts to remember the state of the tab he/she was in. For example, if I am learning by watching "How to build a portfolio website?" video on YouTube or some website in FullScreen, then if I switch to next tab pressing "Crtl + Tab", where I can see my portfolio website which I am editing from VS Code realtime. Now if I press "Ctrl + Tab" again, I want to see my YouTube video in same way, it was left before (i.e FullScreen). Please, for the love of God, give students like us this functionality where students are not annoyed by having to go to fullscreen again and again. (If you don't understand what I am trying to say then, do watch see this: https://imgur.com/a/yjibtLG ) Remember the state of fullscreen-ness, your highness. It's a painful process to repeat every single time. Students learn millions of things every single time through the internet these days. The total amount of time that we save by providing this option is just mindblowing. Let save time. Let make Firefox intelligent. Pass this idea at least. There should be some sort of option in about:config where the browser starts to remember the state of Fullscreen videos especially when he/she does this by pressing Ctrl + Tab.