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 14.0.x: http://www.mozilla.org/en-US/firefox/all.html

• 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.

• http://kb.mozillazine.org/Profile_folder_-_Firefox

hello
My name is thien
my site is: xxx.xxxxxxxx.xxx
xxx.xxxxxxxx.xxxx

I am using Firefox 14, I find Firefox 14 has a problem, it is in error when I open the new tab, so let me ask Firefox have 14 What is wrong, please just help me, while I'm open as tab, then it suddenly disappeared Here are pictures of error:

[links removed by Moderator - please do not post unrelated (spam) links]

To thiendep

You have different problem than the OP that started this thread, so please start a new thread for your question.

• [start a new thread]
• [/kb/Using+the+Troubleshooting+Informatio...]

See:

• http://kb.mozillazine.org/Firefox_crashes
• https://support.mozilla.org/kb/Firefox+crashes