When I open firefox (Note: I have firefox version 28.0 and security Karspersky 2014) I get a black screen, resembling a command prompt window, in firefox.

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  Each time Firefox opened

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  User Agent

  Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152 .NET CLR 3.5.30729;. AskTB5.6)

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  (~ ~ Red: Linux and OSX see ~ ~: what happened to the file, edit and view menus? )
  Windows Method 1. Press and hold the key and press the letters of the following in this exact order: V T M then release the key
  Windows method 2 Press the F10 key, while the Menu bar, choose "view > toolbars", click on 'Menu Bar' so that a check mark next to the Menu bar
  Method Windows 3 Tap once and release the button. The Menu bar is displayed; then choose ~ ~ red: V ~ ~ iew > ~ ~ red: T ~ ~ oolbars and click on ~ ~ Red: M ~ ~ enu Bar as well as a checkbox is placed next to Menu bar
  The menu bar should now be displayed permanently, unless you turn it off again using view > toolbars. Check = not displayed, NO check mark is not displayed.
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  http://support.mozilla.com/en-US/kb/Menu+bar+is+missing
  

  http://KB.mozillazine.org/Toolbar_customization#Restoring_missing_menu_or_other_toolbars
  Navigation, bar toolbar bookmarks and other toolbars under view > toolbars. By clicking on one of them will place a check mark (display) or remove the check mark (not shown).
  To display the status bar, view, and then click status bar to place a check mark (display) or remove the check mark (not shown).
  Mode full screen
  http://KB.mozillazine.org/netbooks#Full_screen

  See also:
  Back and front toolbar buttons or others are missing
  Customize controls, buttons, and Firefox toolbars
  How to customize the toolbar

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  • https://support.Mozilla.org/KB/how-to-use-full-screen