Firefox acting bizarre

I have been using Firefox for years with never a problem.  But today, and only on my main computer, I have problems.  First it would not load any website I visited.  It would time out and say "server took to long to respond".  Then it started to load the sites again but many websites (including Experts Exchange) Firefox would display a certificate warning.  See images I uploaded.   I had to revert to Internet Explorer to be able to cruise the Internet.  Now strangely enough, Firefox on my second computer works fine with none of these problems.  Both are running Windows 7 and the Firefox versions running on both computers are the same.  What should I do?
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ArtG2521Asked:
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Scott ThomsonCommented:
The certification issue may be a computer date/time that is incorrect and therefore you often would get this error.

As for the hanging etc try a restart on your machine and reboot your router to make sure you eliminate these as causes.
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ArtG2521Author Commented:
Computer date/time is ok and functioning normal.  Restart computer and restart modem router has no effect.  Firefox worked fine all day until this evening.  It still works fine on my second computer.
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GaryCommented:
I would normally say Scott is right but that you can use IE ok suggests that your FF certificate DB has got corrupted.
Close FF
From the Start menu click Run and enter
%appdata%
Drill down the Firefox folder to profiles and then whatever the weirdly named folder is under the profiles folder and delete the cert8.db file
Start FF again
Does the problem occur
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Scott ThomsonCommented:
yeah which goes to show it is computer based.
have their been any changes to your machine?
new software
updates

anything like that?
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ArtG2521Author Commented:
Deleted the cert8.db file but the problem is still there.  I have made no changes to the computer. No new software and no updates.  One day it worked fine, hours later it didn't and it won't go away.
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ArtG2521Author Commented:
I even restored an earlier profile backup using MozBackup and the problem is still there.  I would say it would be the newest update to Firefox, but the same version works on my second computer.  Should I try to uninstall reinstall?

I tried things Mozilla suggested.  I started it I Firefox safe mode, didn't work.  I disabled extensions and plugins, didn't work. I viewed certificates nothing strange there.  Ran Malware Bytes, didn't solve the problem, my system is clean.

Not sure what else to do.
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ArtG2521Author Commented:
I've requested that this question be deleted for the following reason:

Though 99% of the time, I'm always happy with EE, not this time.  The first couple of people made suggestions.  I posted back on how many things I tried that did not work.  I received NO MORE responses.  I requested attention.  36 hours later there is NO attention given to my question.  I pay a fee every month to have fairly speedy service, but this time nothing.  I finally had to really drill down spend some time and fixed the issue my self.
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Scott ThomsonCommented:
can i ask what the eventual fix was..? it would be interesting for sure.
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ArtG2521Author Commented:
I searched endlessly through message boards of Mozilla ann the Internet.  All the "fixes" did nothing.  I had no virus, etc. so I was convinced that something, somewhere became corrupt.  I had to get radical and I needed to know how to uninstall Firefox COMPLETELY.  I searched and found this great video (http://www.youtube.com/watch?v=gSUjeWsFTgE) followed the directions which I was somewhat familiar with and uninstalled it.  Prior to this I used MozBackup, a great little program to backup everything in Firefox.  I reinstalled Firefox and the problem was GONE, as I figured it would be.  Then I used MozBackup, BUT I only restored my bookmarks and nothing else, in case these were the source of the corruption.  It brought back ALL my bookmarks and continues to function as great as always.  Problem solved, thank goodness.  Please pass this on to others that encounter this problem.
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ArtG2521Author Commented:
I would like to cancel this request to delete because I solved the problem and expert Scott Thomson suggested I post the fix.  This was a good idea on his part.  I want to make sure that others that have this problem can solve it and avoid the frustration.
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Scott ThomsonCommented:
What may be good for you would also be to try restoring 1 thing after the other now.

This would of course help you find out exactly what it was in Mozilla that was causing the issue. You of course do not have to be if you are interested then it might be worth doing. Because obviously something you saved/installed/cached etc has caused the issue for you. meaning it may likely happen again.

And while having the solution/workaround is always good. finding the cause it what it's all about ^_^
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ArtG2521Author Commented:
You are correct.  I did restore a saved complete profile approximately one month BEFORE the incident occurred, and Firefox worked fine.  Unfortunately, I do not backup Firefox that frequently, so other than it being corrupt for some reason, I do not know the exact cause, but at least I had a fix.
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ArtG2521Author Commented:
Simple.  The fixes suggested by the experts did not work.  No other experts were offering any more ideas, so I spent time and effort to solve this on my own.  Now I want to leave this info with EE so others can solve this issue as well.
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