NoScript locks up my PC when entering the Facebook URL

[Depo1964]

NoScript is enabled for my Firefox browser 21.0.
When I enter the Facebook URL into the navigation window my entire PC locks up for around 45 seconds.
After that, the FB login screen appears.

Note: This only happens the first time that I enter the Facebook URL after a reboot or when first starting my PC for the day.
After that, if I return to the Facebook page it only takes a couple of seconds for the login screen to appear.
btw, I always close my browser after logging out of FB.

Does this sound right that my entire PC locks up for such a long time?
I can't use the mouse, keyboard or anything for around 45 seconds.
I have the Windows Task Manager window open but can't go there to see what processes are running to analyze the problem.
Any help or explanation would be appreciated.
thx.

[therube]

Do you get a busy script warning message when this occurs?

If you disable all other extensions, does this still occur?
If you also disable all plugins, does this still occur?

After it happens, anything related in Error Console (Ctrl+Shift+J)?

[Depo1964]

Get no messages whatsoever.
When I disabled all of the other extensions the lock up occurred when logging out of FB. Interesting.
Since this only occurs when I first start my PC or after reboot, i will be testing each extension/plugin individually to see the results.
I just disabled all other extensions except NoSquint and had no problems with lockup either from logging in or or logging out of FB.
No error or warning "Error Console" msgs so far.
Stay tuned.

[Depo1964]

This problem hadn't been occuring until again today.
Here is the log from the Error Console Messages tab, as soon as i received access of my PC again after logging out of Facebook.
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1373059650234 Services.Metrics.Provider.org.mozilla.addons WARN Add-on type without field: dictionary

1373059651074 Services.HealthReport.HealthReporter WARN Recording new remote ID: 0057f16d-ca04-414a-bc67-584fca9e96d5

1373059651833 Services.HealthReport.HealthReporter WARN Marking upload as successful.

1373059651834 Services.HealthReport.HealthReporter WARN Removing document from remote ID list: 47098e7b-3113-4079-b4a5-f65763506ddc
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