message says operation can not be completed because firefox is in use, so I can't drag it to application box
have downloaded new firefox (have firefox icon already on desktop MAC) in second step I try to drag the icon into the application icon and get message that says it can't because firefox is in use; bold text
have downloaded new firefox (have firefox icon already on desktop MAC) in second step I try to drag the icon into the application icon and get message that says it can't because firefox is in use; '''bold text'''
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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 15.0.1: 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.