@Rafferty3231 You aren't an idiot. This is shitty design. It's literally a key right next to the backspace button that closes all of your tabs without warning, and for some reason it's enabled by default. I just lost about an hour of my time and 4 important paragraphs asking legal advice because I fatfingers the f12 key while trying to press backspace. You can disable this "feature" here (opera://settings/keyboardShortcuts) if you want too.