Check your version of Chrome by clicking that three-dot (vertical ellipses?) icon at the top right, and selecting
About Google Chrome from the menu.
Of course, while keeping Chrome up to date is a good way to protect yourself from browser-based malware, you should also be careful when using extensions. Even Google-approved extensions obtained from the Chrome Web Store may contain malware. Recently, as many as 100,000 computers running Chrome were infected with malware hidden in seven different extensions from the Chrome Web Store.