Log Message:
Update www/firefox and www/firefox-gtk1 to version 1.0.7.  Changes from
version 1.0.6 include:

     * Fix for a potential buffer overflow vulnerability when loading a
       hostname with all soft-hyphens
     * Fix to prevent URLs passed from external programs from being
       parsed by the shell (Linux only)
     * Fix to prevent a crash when loading a Proxy Auto-Config (PAC)
       script that uses an "eval" statement
     * Fix to restore InstallTrigger.getVersion() for Extension authors
     * Other stability and security fixes

Approved by taya.