There has been a change in where Firefox searches for plugins and the plugins folder in the Firefox program folder is no longer scanned for plugins, so Firefox won't find them anymore if they are installed in the plugins folder instead of the "browser\plugins" folder that Firefox now scans.

You can set the plugins.load_appdir_plugins pref to true on the about:config page to make Firefox scan the "<install>/plugins/" directory for plugins like the WMP plugin (np-mswmp.dll).

• http://kb.mozillazine.org/about:config

You can alternatively move plugins from "<install directory>\plugins\" to "<install directory>\browser\plugins\" (create this folder when missing) to make Firefox find them again.

• http://www.ghacks.net/2013/05/15/why-you-may-have-lost-access-to-plugins-or-extensions-in-firefox-21/
• http://mike.kaply.com/2013/04/24/major-changes-coming-in-firefox-21/

there was bug #861595 with other linksys models, which is getting fixed in firefox 22. can you test if you see the same problem with firefox beta?

https://www.mozilla.org/beta

This sounds like a fix for Windows, unfortunately this is on a MAC Book Pro. Any ideas on the MAC Firefox version?

This looks like a Windows fix, unfortunately this problem is on MAC Book Pro. Any ideas on the mac Firefox versions?

have you tried running firefox 22 beta yet? it will work on os x too...