How do I disable full-screen mode in Chrome for Android?
I had the same problem, but I saw the exact moment it happened, a message appeared saying "switching to full screen mode". Then I couldn't switch it off. I deleted all data in Chrome, and the problem was fixed. There was no need to uninstall the app, just cleaned the data using the Android built-in Application Manager. It seems some website included code that caused this, and the Chrome for Android simply does not have the settings to revert this. Hope this helps.