Description of problem:
/usr/bin/firefox script defines #!/bin/sh
but will not work if the default system shell
is dash. IMHO the script, if not rewritten
to be purely POSIX compliant, should begin
with "#! /bin/bash" line (because it expects
BASH apparently).

Version-Release number of selected component (if applicable):
firefox-8.0-3.fc16.x86_64

How reproducible:
change the default system shell to dash (or ksh)

Steps to Reproduce:
1. ln -f -s /bin/dash /bin/sh
2. /usr/bin/firefox &
  
Actual results:
# /usr/bin/firefox
[: 76: /usr/lib64: unexpected operator
/usr/bin/firefox: 195: Syntax error: "(" unexpected (expecting "fi")

Expected results:
firefox should start

Additional info:
- verbose xtrace output: http://pastebin.com/eUYm3G25
- non-verbose xtrace output: http://pastebin.com/suG4K4cK