'''I.''' Your system is infested with malware. Remove "Ads Removal" and "Start Page" from the Add-ons Manager, Extensions category. Chances are you also want to get rid of IObit Apps Toolbar. Once that's done, perform a full system scan with an up-to-date anti-virus, then up-to-date Malwarebytes Antimalware. * [[Troubleshoot Firefox issues caused by malware]] '''II.''' You're running the beta version of Firefox and Flash Player for some reason. # From the following page, right-click the Windows arrow icon next to the language you're interested in. Choose Save Link As and save the installer to the desktop. #* http://www.mozilla.org/firefox/all/ # From the following page, save the uninstaller for Flash Player somewhere handy, like the desktop. #* [http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html#main_Download_the_Adobe_Flash_Player_uninstaller Uninstall Flash Player for Windows | Adobe Support] # From the following page, save the installer for other browsers. If you also use Flash Player in Internet Explorer, also save the ActiveX version. #* [http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html#install_in_a_firewall_proxy_server_environment Direct downloads of Flash Player for Windows | Adobe Support] # Exit all applications. # Run the Flash Player uninstaller. # Run the Flash Player installer for other browsers. # Run the Flash Player ActiveX installer if you downloaded it. # Uninstall Firefox from the Windows Control Panel. <u>DO NOT</u> check the option to remove your personal data. # Run the Firefox installer.

It is also possible to download the previous version (actually the current version now, version 28) [http://www.mozilla.org/en-US/]