Clear the cache and remove the cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences). "Clear the cache": *Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now" "Remove the cookies" from websites that cause problems. *Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies" You can remove all data stored in Firefox from a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History > Show All History" or "View > Sidebar > History"). Using "Forget About This Site" will remove all data stored in Firefox from that domain like bookmarks and history and cookies and passwords and cache and exceptions, so be cautious. If you have a password or other data from that domain that you do not want to lose then make sure to backup this data or make a note. Can't recover from this 'forget' unless you have a backup of involved files. If you revisit a 'forgotten' website then data from that website will be saved once again. ---- There are other things that need attention. The System Details List shows that you have multiple Flash plugins. #Shockwave Flash 18.0 r0 #Shockwave Flash 21.0 r0 You can find the installation path of all plugins on the <b>about:plugins</b> page. *http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins You can check the Flash player installation folder for multiple Flash player plugins and remove older version(s) of the plugin (NPSWF32) and possibly (re)install the latest Flash player. *(32 bit Windows) C:\Windows\System32\Macromed\Flash\ *(64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\

Security Issue: Update your '''[http://get.adobe.com/reader/ Adobe Reader Version 2015.016.20039]''' '''Note: Other Software''' is offered in the download.