Firefox opens with a transparent or blank window

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  • Revision id: 33487
  • Created:
  • Creator: philipp
  • Comment: update to incorporate feedback
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: No
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On a system with problematic add-ons installed, Firefox may open with a blank or transparent window and with no interface elements visible. In some instances the browser also crashes. This article describes how to resolve the problem.

blank or transparent window

Note: This is an example how an affected version of Firefox might look like.

1. Start Firefox in Safe Mode

Make sure that no other instance of Firefox is running or no other Firefox window is open.

You can then start Firefox in Safe Mode by holding down the shift key while starting Firefox or alternatively press the Windows key + R and open: firefox.exe -safe-modeholding down the option key while starting Firefox.

Safe Mode Fx 15 - Win

Now click on the Start in Safe Mode button in order to run Firefox with extensions and themes disabled for this session.

2. Find and remove problematic extensions

  1. Click the menu button Fx89menuButton, click Add-ons and themes and select Extensions.
  2. Look out for suspicious extensions, in particular entries that you have not installed intentionally or don't know what purpose they serve. For example toolbars that come bundled with third-party software can cause this issue. Other examples of problematic add-ons are Browser Companion Helper, Codec 1.0, Codec-C, OneClickDownloader, TheBflix & wxDfast (list is not exhaustive).
  3. Click the Remove button or in case it is not available disable those extensions.
  4. Afterwards restart the browser.
Note: If you're unsure which extension to remove or disable, disable all extensions listed in the Add-ons Manager and restart Firefox.

3. Check your computer for malware

After completing the above steps, check your computer for malware. See How do I get rid of malware? for some recommended malware removal programs.