Is this a problem with the Adobe Reader or what version Firefox displays in about:addons and on the about:plugins page? Try to delete the pluginreg.dat file in the Firefox Profile Folder and maybe addons.sqlite as well to reset the plugin registry databases. See Re-initializing the plugins database: *https://support.mozilla.org/kb/troubleshoot-issues-with-plugins-fix-problems You can use this button to go to the current Firefox profile folder: *Help > Troubleshooting Information > Profile Directory:<br>Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder *http://kb.mozillazine.org/Profile_folder_-_Firefox ----- Note that iIf you can't update the Adobe Reader program from within the reader (i.e. you have the latest version) then you can ignore the report on the plugin check page. We have seen in the past problems on the plugin check page with detecting the latest Adobe Reader version because Adobe changed the way the AR reports itself. Adobe doesn't offer all versions of the Adobe Reader on its downloads page and the only way to be sure that you have the latest AR version is by checking for updates in the AR program until no updates are available.