Google rolled out the Chrome 58 and now is looking ahead to Chrome 59 that will bring some significant changes. All users with at least 4 GB RAM in their devices will automatically get the 64-bit version. Also, the native notifications will have a new more user-friendly design. Starting from version 59, Chrome's notifications will sport a new flat design, and the cards will finally appear naturally on macOS. The new version also will add support for animated PNGs. If you have a 64-bit Windows machine and no less than 4 GB RAM, you will eventually receive the safer and lighter 64-bit...
Source: http://www.gsmarena.com/chrome_is_switching_to_its_64bit_version_on_windows_-news-24857.php