Firefox Hangs when profile location is Offline Files

Hi all,
We are having some problems with custom profile locations on windows 7
"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -Profile "U:\Firefox\Profile"
We use the above command to launch firefox. The u drive is a drive that is ALWAYS available for all users. This drive is redirected to the home folder of the user. To sync these folders we use Offline files.
During our testing fase we had no problems at all with this method. But in the last week we receive more and more people complaining that firefox hangs. (Read: no error specific error just stops responding and windows asks to close firefox)
In my troubleshooting quest i found that as long as i don't use internet ( so not using our proxy server squid) it all works. But from the moment i try using for example google, firefox stops responding.
The tricky part is that sometimes it happens after 5 minutes, couple of hours, few days.
Once it happened after 5 minutes, the only way to solve it is to delete the profile folder on the U Drive and start over.
So any help on identifying this problem is welcome. If more info is needed let me know what you need.

Hi,
''FredMcD [[#answer-691359|said]]''
<blockquote>
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
Did Firefox close, or did it crash?
In the address bar, type '''about:crashes'''<enter>.''' Note:''' If any reports do not
have '''BP''' in front of the numbers, click it and select '''Submit'''.
Using your mouse, '''mark''' the most '''resent 7 - 10''' crash reports, and
'''copy''' them. Now go to the reply box below and '''paste''' them in.
Start '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in Safe Mode]''' {web Link} by holding down the '''<Shift ''(Mac Options)'' >''' key, and then starting Firefox. Is the problem still there?
I've called the big guys to help you. Good luck.
</blockquote>
Well Didn't get an error from Firefox but windows stated that Firefox was not responding: if i click wait then it just keeps running but cant click anything or do anyting.
When trying about:crashes i get:
Submitted crash reports: no crash reports have been submitted and thats is no items are in there.
For the last thing din't try to run it in safe mode will try to reproduce the problem again and try the safe mode and will post the updates.
Thanks already for the tips.

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