If you leave Chrome open for days, an update can be ready while your current window is still running the older version. You can check without downloading a separate installer.
On a desktop computer, open Chrome’s three-dot menu. Under Help, choose About Google Chrome. The page shows your installed version and checks for updates. If it offers a relaunch, save any unfinished work first and then restart the browser from that page.
Chrome generally restores regular windows after a relaunch. Incognito windows do not reopen. On Linux, Google directs users to their package manager for updates.