Drop down flash menus and then disappear before I can use them

The menus that appear when the mouse is over a few drop-down buttons are sustainable is more long enough to use on some but not all web sites.
They are flashing, you can see that they are there, but you can't move the mouse down to make a selection.
This happened with an old version and 28.8 I went to today. This makes it almost unusable browser.
I tried the safe mode, no difference.
Remove the Mozilla folder and reinstalled it, no difference.

Computer Windows 7,.

I have seen that this is one problem for others when I search but I can't find a solution.
Thanks for any help

To disable hardware acceleration does not work as well?

  • Tools > Options > advanced > General > Browsing: "use hardware acceleration when available.

Start the computer in safe mode Windows with network support (on the startup screen, press F8) as a test to see if that helps.

Do a clean reinstall and delete the program folder before Firefox to (re) install a new copy of the current version of Firefox.

Download a new copy of Firefox and save the file to the desktop.

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

  • Do NOT remove the data personal when you uninstall your current version of Firefox, because all profile files will be deleted and you lose personal data such as bookmarks and passwords from other versions of Firefox profiles.

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

  • (32-bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (Windows 64 bit) "C:\Program Files (x 86) \Mozilla.

Your bookmarks and other personal data are stored in the Firefox profile folder and will not be affected by a uninstall and (re) install, but make sure that 'delete personal data' is NOT selected when you uninstall Firefox.

If you keep problems also create a new profile.

Tags: Firefox

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