Firefox won't install on my Mac, it just finishes the installation then does not appear in my Applications folder.

Firefox offered to create a new profile for me, but took forever to do so so eventually I had to shut off the computer. In restarting, initially Firefox would not open as "Profile could not be found". Having moved Firefox to my trash folder, when I attempt to install Firefox again, it completes the download, then does not appear in my Applications folder.

This is likely caused by a problem with the profiles.ini file and the profile marked as Default=1 in this file is not present on the hard drive.
*Mac: ~/Library/Application Support/Firefox/
You can use one of these to make Firefox create/use a new default profile:
*Delete the profiles.ini file to force Firefox to create a new default profile
*Use the Profile Manager to create a new profile
*Use "Choose Folder" when you create a new profile to select the location of a lost profile and recover this profile
*http://kb.mozillazine.org/Profile_Manager
*https://support.mozilla.org/kb/Managing+profiles
*http://kb.mozillazine.org/Profile_folder_-_Firefox
Download and save the full Firefox installer to the desktop and start the installation with a double-click on the desktop icon.
You can find the full version of the current Firefox 29.0.1 release in all languages and for all Operating Systems here:
*http://www.mozilla.org/en-US/firefox/all.html
See also:
*http://kb.mozillazine.org/Installing_Firefox#Mac_OS_X

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