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After starting Firefox, the first letter I type will not show. This is not a keyboard problem

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  • 최종 답변자: basdefize

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After Starting Firefox, I have to type the first letter twice before it shows. I also have problem logging in to webpages with passwords, have to type the password twice, even if the program indicates with a dot that it recognizes I pressed a key. This does not occur in other programs, but it does occur in the Explorer browser as well.

After Starting Firefox, I have to type the first letter twice before it shows. I also have problem logging in to webpages with passwords, have to type the password twice, even if the program indicates with a dot that it recognizes I pressed a key. This does not occur in other programs, but it does occur in the Explorer browser as well.

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Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

  • You can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
  • Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Once you get the pop-up, just select "'Start in Safe Mode"

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

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Hi! I tried safe mode, but this does not solve the issue. Too bad! Thanks for your suggestion anyway. Bas.

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The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.


Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

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Hi again, restoring the factory settings did not help either....

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Which security software (firewall, anti-virus) do you have?

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

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Booting the computer in safe mode indeed solves the problem. So now the question is what does this mean? Apparently it is a windows problem, but how do I tackle it? Thanks so far!