By default, when users install Chrome, they receive the most stable and supported build available. However, Chrome fans and web developers have long been able to opt into new Chrome features by installing pre-release packages such as Chrome Beta and Dev. Historically it’s been impossible to install these pre-releases on the same computer as stable Chrome, forcing developers to choose between testing their site in the next version of Chrome and experiencing their site as users see it now.
Starting today, Chrome Beta and Chrome Dev can be installed on the same Windows computer as stable Chrome and run simultaneously, allowing developers to more easily test their site across multiple versions of Chrome. This means side-by-side Chrome installation is available on Windows, Android, and Linux, and will be made available on other platforms in future releases.
To install Chrome Beta or Chrome Dev, visit the Chromium release channels page. If you already have Chrome Dev or Beta and wish to run it side-by-side with stable Chrome, you’ll need to uninstall it and then reinstall from this page. To easily transfer your bookmarks, settings, and other data, sign in to Chrome before you uninstall. And if you see something not quite right in Chrome Dev or Beta, please send us feedback.
Posted by Greg Thompson, Bitmason
Source: Run multiple versions of Chrome side-by-side