I decided to try to update Firefox to 15 by firstly adding the repositories as instructed on the mozilla site but get the following message when reloading synaptic.
Failed to fetch http://ppa.launchpad.net/mozillateam/fi ... ce/Sources 404 Not Found
Failed to fetch http://ppa.launchpad.net/mozillateam/fi ... 6/Packages 404 Not Found
Some index files failed to download. They have been ignored, or old ones used instead.
I then tried extracting the tar file but this failed when I tried to move the file to /opt
Firefox 14 still showed as installed in synaptic so I removed it and re-installed it but now I cannot launch it from the mint menu or a terminal.
Any help please.