Adobe Flash Player plugin for firefox -

i seek install adobe flash player plugin on firefox 39.0 users of terminal server.

i've found many solutions on internet of not work (yay). can explain me 1 working solution latest adobe flash player on firefox 39.0 of users, able see flash? i'd rather stuff in program files (x86)/mozilla firefox/browser in everyone's users/user1/appdata/roaming/mozilla.
in advance

apparently firefox blocks versions of flash older 18.0.0.209, check you've got that, or else try unblock manually.

source: http://gizmodo.com/firefox-now-blocks-flash-by-default-1717664482