The installation program of 3.6.4 version asks me closing Firefox to continue the installation. But after the closing of Firefox, it asks the same. How shall I do ?
I tried to install the 3.6.6 update, but it asked me closing Firefox. I did that, but it continues showing the same message "Fermez Firefox pour continuer (close Firefox to continue)".
Every time Firefox opened
== I tried to update Firefox
I made a mistake on the title of the topic : it is 3.6.6 and not 3.6.4 installation program.
Make sure that there are no Firefox processes left in the Task Manager (Shift+Ctrl+ESC, Processes tab)
See also http://kb.mozillazine.org/Software_Update (Software Update not working properly)