You need to locate the profiles.ini file or use the Profile Manager to create a new profile.

See:

• https://support.mozilla.org/kb/how-run-firefox-when-your-profile-missing-or-inacc

This is usually caused by a problem with the profiles.ini file and the profile marked as Default=1 in this file is no longer present on the hard drive.

You can use one of these to make Firefox create a new default profile or reuse an existing profile:

• Delete the profiles.ini file to force Firefox to create a new default profile
• Use the Profile Manager to create a new profile
  If you still have an existing profile then click "Choose Folder" in the PM and select the location of a lost profile and recover this profile.

You should find the profiles.ini file in this hidden location:

• Windows: %AppData%\Mozilla\Firefox\
  C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\
• Linux: ~/.mozilla/firefox/
• Mac: ~/Library/Application Support/Firefox/

Windows hides some file extensions by default. Among them are .html and .ini and .js and .txt, so you may only see file name without file extension. You can see the real file type (file extension) in the properties of the file via the right-click context menu in Windows Explorer.

• http://kb.mozillazine.org/Profile_Manager
• https://support.mozilla.org/kb/Managing+profiles
• http://kb.mozillazine.org/Profile_folder_-_Firefox

I need more help, I don't know where to type the hidden file location for Windows that begins %AppData I need to be "walked through " every step of it, as I am not familiar with a lot of stuff Also where would I type the http: Mozillaine.org do I do that as well as the other thing?

Hello!

If you don't have any data from the previous profile the easiest route is a clean install of Firefox

Certain Firefox problems can be solved by performing a Clean reinstall. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:

Note: You might want to print these steps or view them in another browser.

1. Download the latest Desktop version of Firefox from mozilla.org (or choose the download for your operating system and language from this page) and save the setup file to your computer.
2. After the download finishes, close all Firefox windows (or open the Firefox menu and click the close button ).
3. Delete the Firefox installation folder, which is located in one of these locations, by default:
   • Windows:
     • C:\Program Files\Mozilla Firefox
     • C:\Program Files (x86)\Mozilla Firefox
   • Mac: Delete Firefox from the Applications folder.
   • Linux: If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
4. Now, go ahead and reinstall Firefox:
   1. Double-click the downloaded installation file and go through the steps of the installation wizard.
   2. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

More information about reinstalling Firefox can be found here.

WARNING: Do not use a third party uninstaller as part of this process. Doing so could permanently delete your Firefox profile data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be easily recovered unless they have been backed up to an external device! See Back up and restore information in Firefox profiles.

Please report back to say if this helped you!

Thank you.

ellenb7580 said

I need more help, I don't know where to type the hidden file location for Windows that begins %AppData I need to be "walked through " every step of it, as I am not familiar with a lot of stuff Also where would I type the http: Mozillaine.org do I do that as well as the other thing?

Hi, see how to enable the run command in your windows 7 :

• http://windows.microsoft.com/en-us/windows/what-happened-run-command#1TC=windows-7

• http://www.howtogeek.com/howto/windows-vista/enable-run-command-on-windows-vista-start-menu/?PageSpeed=noscript

and then copy the next bold %AppData%\Mozilla\Firefox\ and paste it in the run command search box. Now see the first cor-el's link above to continue, find the profile.ini file and delete it, to force firefox to create a new profile. You can do it, if you need anything else or stuck somewhere just tell us. :-)

thank you

I can't get the solution to work , run is already checked and so does not appear on the side as it said it would, where do I put this ? %AppData%\Mozilla\Firefox Some one send me email I can respond to not noreply , this is to confusing to me to not have direct contact with someone!