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Firefox update won't download when prompted. Downloaded latest version from site but won't install because I don't have proper permissions.

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Prompted to download latest update when using Firefox. Downloaded latest version from site; went to install & can't because I don't have proper permissions.

Prompted to download latest update when using Firefox. Downloaded latest version from site; went to install & can't because I don't have proper permissions.

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If there are problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.

Download a new copy of the Firefox program and save the disk image (dmg) file to the desktop

  • Trash the current Firefox application to do a clean (re-)install
  • Install the new version that you have downloaded

Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks and other personal data if you uninstall and (re)install Firefox.