You won't. That's still version 11.2. It's because of a simple fact, that Adobe does not support Flash on Linux for a at least a year now. Linux version of Flash stopped as version 11.2. The current released version on Windows is 16.x.
Chromium-based browsers can overcome this problem using the PepperAPI-based version of the Flash plugin bundled with Chrome (that's how, for example, ArchLinux handles Flash installation in Chromium). Sadly any other (non-Chromium) Linux browser uses the Netscape Plugin API and that version of Flash plguin has long been abandoned (there are some occasional security fixes, but that's it).