Look at your menu pick and what path it leads to what binary you will run. Make a new menu pick to your new version...
Dist: Mandriva Linux 2006
I recently downloaded and installed Firefox 126.96.36.199.
However, when I rebooted after the install, the previous Firefox version (1.0.4)
I know there is a configuration file that will adjust this problem but I forgot.
If you know, please let me know.