libflashplayer.so missing in Debian Stretch

I have followed all the instructions in the [wiki page](https://wiki.debian.org/FlashPlayer) , I made: sudo apt install libflashplayer-nonfree But after the installation the folder /usr/lib/flashplugin-nonfree doesn't contain the library libflashplayer.so, there is only the pubkey.asc file. So Firefox can't see the plugin. I also have tried to find that library in other locations but it does not seem to be anywhere.