This sounds like an issue with the MOZILLA_FIVE_HOME environment variable (yes, I know you're not running Moz, but Netscape uses it too.) As Philippis said, you should be able start it by explicitly stating the path to the executable. If a symlink won't start it (or if the explicit command doesn't work), try "echo $MOZILLA_FIVE_HOME" - that should point to the installation path. If not, look around for the path, and test it with "export MOZILLA_FIVE_HOME=<path>". Then you'll need to find where that variable is set in your config files - probably in /etc/profile - and change it.