«To provide the best experience for the most-used Linux versions, we will end support for Google Chrome on 32-bit Linux, Ubuntu Precise (12.04), and Debian 7 (wheezy) in early March, 2016. Chrome will continue to function on these platforms but will no longer receive updates and security fixes. We intend to continue supporting the 32-bit build configurations on Linux to support building Chromium. If you are using Precise, we’d recommend that you to upgrade to Trusty», says Dirk Pranke, Software Engineer, Google.
http://betanews.com/2015/11/30/google-killing-chrome-for-32-bit-linux/