Using Firefox 84.0.2, Mac OS 11.1 Big Sur. When using Amazon Prime Video to access CBS All Access, I open Firefox, go to the proper Amazon Video address, sign in to my account, click the program to be watched, and click the full screen icon *in the video*, but the tool bar does not disappear. Prior to updating to OS 11.1, this worked perfectly: it would go to full screen. Now, I need to upon opening the browser, use the Firefox prefs, and click the full screen icon first. Then, when the program screen opens and content is played, I can click the full screen icon *in the video screen* and it makes the toolbar disappear. Ok, I know this is a first world problem, but I liked the one click approach better than the two click. Is there a way to get back to the one click solution? It seemed Firefox was remembering what to do before (?) before the update.