since FF 33 was working just fine. ..
it's FF 34 that is saying that Flash 11.2.202.424 is out-of-date.
the strange thing is that FF is blocking sites by saying that flash is unsupported,
and there is no option to re-activate it.
however - in most cases - it's actually *not* even needed - it's advert - that is asking for it. ..
- so - click on the X in the RHS corner - to remove it - for that page.
EDIT:
if you get the file: install-flash-player -11.tar.gz,
& extract the file "libflashplayer.so"
- copy that file to /usr/lib/mozilla/plugins/
back up the old *.so file to /plugins/bak
exit FF first, then copy the file, as stated.
- you will need to copy the file as SU ..
then goto:
http://helpx.adobe.com/flash-player.htmlcheck that your flash is working,
as per step 5.