Hi, Open Finder > Go Hold CMD button to Display the Library. Goto Library Folder > Application Support > Firefox > Profile Folder

Copy the folder to desktop and uninstall firefox and restart your system.

• folder name ends with ".default"

Download firefox and install it. After that move your content from old profile to new profile.

Profile Backup and Restore

• http://kb.mozillazine.org/Profile_backup
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

I don't have Firefox under Application Support as I had deleted that as an attempt to solve the issue.

Note that this is the Library folder in your home directory and not the global Library folder. The "~/Library" folder is a hidden folder.

Did you previously found the profiles.ini file?

• ~/Library/Application Support/Firefox/

There might be a problem with permissions/ownership of involved folders/files preventing access.

See:

• https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

You can try these steps:

• delete the profiles.ini file to make Firefox create a new (default) profile
• use the Profile Manager to create a new profile
  https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
• register an orphaned profile that isn't listed in the Profile Manager

See also "Profile was moved or renamed":

• https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

Note that you should never use "Choose Folder" to specify a folder that already contains files that do not belong to Firefox. Only use "Choose Folder" to recover an profile that isn't listed in the Profile Manager.

If this didn't work then check the read/write permissions and owner or remove the Mozilla/Firefox folder in both main/root and cache locations.

Location of the cache files.

• Mac: ~/Library/Caches/Firefox/Profiles/

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Deleted profile.ini manually. Deleted All possible caches related to Mozilla and Firefox. Nothing Worked. Still shows the same "Profile missing. The profile cannot be loaded error." Any other solutions?