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Lowercase "w" doesn't work in some applications.

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Lowercase "w" doesn't work in some applications like Twitter and Hotmail, for example. Seems to be working in this window. Works OK in Internet Explorer. Tried a cold boot, updating keyboard driver, uninstalling Firefox and reinstalling, but the problem still exists. What can I do to remedy this problem. Windows 7 OS. Thanks.

Gene Bethune

Lowercase "w" doesn't work in some applications like Twitter and Hotmail, for example. Seems to be working in this window. Works OK in Internet Explorer. Tried a cold boot, updating keyboard driver, uninstalling Firefox and reinstalling, but the problem still exists. What can I do to remedy this problem. Windows 7 OS. Thanks. Gene Bethune

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Hello,

Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that turns off some settings and disables most add-ons (extensions and themes).

(If you're using an added theme, switch to the Default theme.)

If Firefox is open, you can restart in Firefox Safe Mode from the Help menu by clicking on the Restart with Add-ons Disabled... menu item:
FirefoxSafeMode

If Firefox is not running, you can start Firefox in Safe Mode as follows:

  • On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
  • On Mac: Hold the option key while starting Firefox.
  • On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
    (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

Once you get the pop-up, just select "'Start in Safe Mode" Safe Mode Fx 15 - Win

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 to find the cause.

To exit 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 others with the same problem.

Thank you.

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Create a new profile as a test to check if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem