A deinstall is simple. Just go into synaptic and type in flashplugin. Completely uninstall any flashplugins that show as installed.
If you are only interested in using the older plugin on a per user basis rather than system wide the easy way to do it is to extract libflashplayer.so from the flashplugin package you want to use . Then go to the /home/'username'/.mozilla/firefox/'profile-name' folder. There should be a plugins folder under it. Insert libflashplayer.so in the plugins folder.
A deinstall is simple. Just go into synaptic and type in flashplugin. Completely uninstall any flashplugins that show as installed.
If you are only interested in using the older plugin on a per user basis rather than system wide the easy way to do it is to extract libflashplayer.so from the flashplugin package you want to use . Then go to the /home/' username' /.mozilla/ firefox/ 'profile- name' folder. There should be a plugins folder under it. Insert libflashplayer.so in the plugins folder.
If the plugins folder does not exist, create one.
/home/ 'username' /.mozilla/ firefox/ 'profile- name'/plugins
When you restart firefox it should recognize your flashplugin.
As for Chrome. I am not getting it's newer flashplugin to work either.