"Open menu" not working, just like "Inspect element" and "customize toolbar"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Like I said, I already tried safe-mode. Disabling acceleration does not help. The theme is "default".

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

• Download the full Firefox installer and save the file to the desktop
  https://www.mozilla.org/en-US/firefox/all.html

If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.

• Do NOT remove "personal data" when you uninstall your current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including data in profiles created by other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

• (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
• (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

• It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
• http://kb.mozillazine.org/Uninstalling_Firefox

Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.

If you keep having problems then also create a new profile.

• http://kb.mozillazine.org/Profile_folder_-_Firefox
• http://kb.mozillazine.org/Profile_backup

• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Like I mentioned in the initial message - I did try reinstalling, with deleting everything from ProgramFiles folders, removing all "Mozilla" files from my AppData folder and even cleaning the registry.

I am not the only one with this problem: https://support.mozilla.org/en-US/questions/1013671

THE ONLY thing that helps is installing Firefox version 30! Which cannot be consedered a "solution" or a "workaround". Please, with all the respect, stop giving obvious advices and admit the problem: Firefox 31 and later is not compatible with Windows 8.1 64bit. More reports here: https://support.mozilla.org/en-US/questions/1013671

Any news about this bug?

Can someone please report a bug to bugzilla?? Tried version 32 - still not working!!!