I am blocked from updating to Firefox 19.0 on my iMac. The error code: "Firefox is on the disk image." No help at Apple.
My Firefox version is stuck on version 16.0.2. I've downloaded version 19.0 several times, but when I drag the firefox icon to the applications folder, I get a message about firefox 16.0.2 is on the disc image. I tried to drag all icons to the trash but am not permitted. How do I unlock this so I can update?
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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
- Firefox 19.0: http://www.mozilla.org/en-US/firefox/all.html
- Trash the current Firefox application (e.g. open the Applications folder in the Finder and drag the Firefox application to the Trash) to do a clean (re-)install
- Install the new version that you have downloaded
- https://support.mozilla.org/kb/Installing+Firefox+on+Mac
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.