firefox will not open with new user
 

I have been running firefox fine under the user I initially created when I installed the distro. I just added a new user to the system and everything works fine for the new user expect firefox. When a enter the command to start firefox it just hangs in the terminal for a second and then returns. No output of any sort. The .phoenix and .mozilla-firefox folders in the new users's home folder are created when I run the command but firefox does not open. If I delete those folders and then rerun the firefox start command the folders are recreated. Any suggestions?

My FireFox installs at /opt/firefox/firefox. If you set the other a/c in this way there should be no reason why you couldn't invoke Firefox.
You may also want to check out the permissions, although cannot really imagine why they would be out, from what you have described..
Run a quick check on where things are in your system: enter "whereis firefox" at a console sans quotes, and this should yield the path which maps out the routing for firefox
enter that path at a prompt and see what happens ...

You could also try using the static version of Firefox at the Mozilla site.

You could try running firefox --profilemanager, and creating a new profile for the new user. If you have installed Firefox manually (extracting a nightly from the Mozilla site, for example, rather than installing a packaged binary for your distribution-- most of which do not have packaged binaries readily available), then presumably Firefox is trying to read a default profile from a folder that it has no rights to read/write/execute as this user-- meaning the $HOME$ folder of the original user, or a shared location that the new user also has insufficient rights to access.

Creating a new profile for the new user might well solve that problem.

ok I got it working. For some reason I guess it needs write access to the /opt/mozilla-firefox folder in order to successfully create the new profile. Was just giving it rx access before. All set, thanks for your help everyone.