Comment 81 for bug 865672

You do not need the closed-source Google Chrome just to run its Flash plugin. It is also available in Chromium:

chromium --ppapi-flash-path=libpepflashplayer.so --ppapi-flash-version=VERSION

You can extract the libpepflashplayer.so from chrome package. E.g., first download

https://dl.google.com/dl/linux/direct/google-chrome-stable_current_amd64.deb

and extract it:

ar p "./chrome.deb" "./data.tar.lzma" | xzcat | tar xO "./opt/google/chrome/PepperFlash/libpepflashplayer.so" > "./libpepflashplayer.so"

The Flash version is available in the package manifest:

ar p "./chrome.deb" "./data.tar.lzma" | xzcat | tar xO "./opt/google/chrome/PepperFlash/manifest.json" | grep "version"