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Firefox is launches with two windows.

  • 3 replies
  • 1 has this problem
  • 6 views
  • Last reply by FredMcD

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When Firefox is launch, it is opening in two screens. One with black popup having information about Spell checker.

I have re-installed Firefox but problem still exists.

It is very annoyed as my automated system have step to open Firefox and it refers to black screen.

Can you please help me to stop black screen.

All Replies (3)

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system restore could solve your problem

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Security Issue: Update your Flash Player Version 18.0.0.232
https://www.adobe.com/products/flashplayer/distribution3.html
Note: Windows users must download the “Internet Explorer” and “Plugin-based browsers” installers.

Note: Edge on Win10 does not use ActiveX version but its own Flash.

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

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Refresh Firefox {web link} is a LAST RESORT ! !

Refresh Firefox - reset add-ons and settings

If you're having problems with Firefox, refreshing it can help. The refresh feature fixes many issues by restoring Firefox to its default state while saving your essential information like bookmarks, passwords, and open tabs.


You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.