An anonymous reader writes: Google today announced it will block local Chrome extensions starting in January, but only on the Windows platform. This means that next year, Windows users will only be able to install extensions for the company’s browser from the Chrome Web Store. The changes will affect both Chrome’s stable and beta channels on Windows. Google says it will continue to support local extension installs on its Dev and Canary channels, as well as installs via Enterprise policy. Chrome apps are not affected at all and will continue to be supported normally.