The Finder can’t complete the operation because some data in “Firefox.app” can’t be read or written. (Error code -36)
My Firefox was not working, so I deleted it and planned to reinstall it. I downloaded Firefox using Safari. When I try to reinstall, I get the above message.
My Firefox was not working, so I deleted it and planned to reinstall it. I downloaded Firefox using Safari. When I try to reinstall, I get the above message.
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Try to repair the disk permissions:
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.