Do you even have Adobe Flash installed for Firefox? It doesn't appear on your More system details... listing.

There are two versions of Flash, the ActiveX version for IE, and the Plugin version for other browsers, including Firefox.

See Install the Flash plugin to view videos, animations and games

Adobe Flash Player active x version 10.1.102.64 and Adobe reader X 10.0.0 are installed

I'v relaoded 4 times and I still get An old version of the Flash plugin was detected. Please upgrade your Flash plugin. No problems with text it's just picture gallery I can't view.

See http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins
You can see the installed plugins on the about:plugins page.
If you set the pref plugin.expose_full_path to true on the about:config page then you see the full path of plugins on the about:plugins page.
It is best not to leave that pref set to true as it exposes that full path to web servers, so reset that pref to false after you are done with the about:plugins page.

You can open about:plugins and about:config via the location bar, like you open a website (about: is a special protocol to access some build-in pages).
If you get a warning when opening the about:config page then you can confirm that you want to continue.
See "Manually uninstalling a plugin" on Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems