opensuse what ?
the current is 13.2
and FF is installed by default !!!
it is in /use/bin
please post the error from launching FF from the terminal
there WILL!!!!! be an error if it will not run
open yast2
go to install and remove software
after you type in your root password ( a pop up will ask)
type firefox into the search
it is installed BY DEFAULT
that is unless you uninstalled it