The crash is related to the plugin-container process. You can check for problems caused by a recent Flash 11.3 update and possibly downgrade to Flash 11.2 or 10.3. *https://support.mozilla.org/kb/flash-113-doesnt-load-video-firefox *https://support.mozilla.org/kb/flash-113-crashes See also: *http://kb.mozillazine.org/Firefox_crashes *https://support.mozilla.org/kb/Firefox+crashes ---- See also: * http://windows.microsoft.com/en-US/windows7/The-Language-bar-overview The Language bar (overview) It is possible that you have switched the keyboard layout by accident. * Make sure that you have the Language bar visible on the Windows Taskbar. * You can do that via the right-click context menu of the Taskbar: Toolbars > Language Bar. * Check the keyboard language (keyboard layout) setting for the application that has focus via the icon on the Language bar. * You need to do that while Firefox has focus because Windows remembers the keyboard layout setting per application. * The default keys to rotate the layout is a combination (Ctrl+Shift or Alt+Shift) that can easily be used in Firefox to activate a menu item. * To avoid an unintentional switch, assign a specific key sequence (Alt/Ctrl+Shift+number) to select keyboard layouts and remove the key combination to rotate layouts (Alt+Shift or Ctrl+Shift) * Control Panel > Regional and Language Options > Keyboards and Languages > Change keyboards > Advanced key settings > Change key sequence