I'm running on Windows 7 and my close tabs are blackened?

The tab at the top right of the page is blacked out. This is the tab for
closing Firefox. When I click in the black box where the close button must be; It closes.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/tools > Modules > Extensions) or if hardware acceleration is the cause of the problem.

  • Put yourself in the DEFAULT theme: Firefox/tools > Modules > appearance
  • Do NOT click on the reset button on the startup window Mode safe

If you use a non-standard windows theme or other changes in appearance then trying to return those and use a standard theme (different).

  • Control Panel > personalization > Theme & window color and appearance

Tags: Firefox

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