Cannot open the menu options

I never had any problems using Firefox before. but now, everytime I open a new tab, my pinned pages have disappeared. It now says:

The address is not valid

The URL is not valid and cannot be loaded.

   Web addresses are usually written like http://www.example.com/
   Make sure that you're using forward slashes (i.e. /).

and when I try to open the options in the upper right corner, it says the same thing.

I tried restarting Firefox with Add-ons disabled, it still does not.

everything works fine, I'm browsing the internet very well. It's just the tab and the options that does not work. Help, please. Thank you

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

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

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

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 do NOT delete personal data when you uninstall Firefox which removes all Firefox profile folders and you lose your data.

If you keep the problems, and then create a new profile.

Create a new profile as a test to see if your profile is the source of the problem.

See "create a profile":

If the new profile works then you can transfer files from a profile already used in the new profile, but be careful not to copy files corrupted to avoid transporting more problems.

Tags: Firefox

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