FF 9.01 has bizzare behavior, sever not found, sites look wrong, left tab back, failed sign ons, etc.

Question

'''Moderator edit: Locked, duplicate of [https://support.mozilla.org/en-US/questions/910533 910533]'''
'''Anyone else having problems with FF 9.0.1? I mean multiple, strange problems! Ever since I upgraded to this latest version of Firefox 9.0.1, I have frequent "server not found" on common web sites like www.google.com, www.amazon.com, www.tvguide.com, etc.
All these problem are frequent but inconsistent. Happens most, but not all of the time. Repeated attempts to execute a site url will, eventually (usually) get a good response.
Further, when pages are found, they open up looking wrong - unformatted text, no graphics, missing html commands, etc.
Also, on several sites, I am unable to sign on or exchange information/data. Logons are not accepted, fail or are repeated over and over, responses not recognized, etc. This seems to especially true for Yahoo and ATT web sights.
Lastly, just to add insult to injury, that damnable left side tab on my Google home page (igoogle) is BACK!!
Switching to Chrome and/or IE eliminates these problems, but I still prefer FF!
'''I have reviewed the articles here and tried several alterations on the config page, but nothing has helped.'''
I have flushed my cache, cookies, history with no benefit! I have also, as I am now, started FF in safe mode band EVEN in SAFE MODE, with EVERYTHING disabled, I still get the bizzare responses and the left tab is still back.
Is there a way to reload FF completely with every thing set as itv it was BEFORE the last upgrade or to go back to an earlier version? What is it about 9.0.1 that is causing all these problems?
BTW, incidently, aabout the same time as upgrading FF, I also switched from Comcast cable ISP to ATT DSL ISP at a even higher speed - 18.0 Mbps. Not sure if that matters; I think the behavior was evident BEFORE the switch over.
Any ideas or suggestions? Are the setting in my config under "useragent" correct? The Ivp6 settings?
Your help would be greatly appreciated!
Bob Woolf'''

Answer 1

'''Cor-el,
I think it's time to bring some of those kryptonian super powers of yours in to play! :)
Yes, I am still having problems. I tried to load in the online site for my bank, Navy Federal Credit Union. I got the old "server not found" BS. I did as you suggested and executed a SHIFTED Reload and that worked, at least in the since that I was able to get the opening page.
However, when I went to sign on, the trouble appeared. Similar to the failed logons and recycling sign ons that I had seen on Yahoo and a few other sites, WHEN I logged onto NFCU's page (they have an unusual three part logon), as soon as I sign on I am IMMEDIATELY told I have "timed out" on the session and am kicked off. Repeated attempts to access my account yields the same thing over and over. I tried to sign on using Internet Explorer and there was NO PROBLEM AT ALL, so the issue is specific to FF.
I then flushed the cache and retied; no luck. I tried SAFE MODE and again no luck. I then went in a flushed the cache, again, and deleted all associated cookies. Again no luck.
Then I flushed the cache, reset ALL the preferences and tried again, still no luck.
As it stands now, I have reset the USERAGENT entries, flushed the cache, reset the preferences and, removed the cookies and still, EVEN in SAFE mode, Firefox and NFCU can't get along. Neither can Yahoo.com!
So, after all that,I am at my wits end. Suggestions? Should I send you a refreshed copy of my troubleshooting dump?
Keep in mine that I have, up until 9.0.1 came out, been using FF to aces s all these sites without any problems. So I guess the question has to be: Exactly what was changed in 9.0.1 from the previous version that has made it act this way?
Ideas? Suggestions? Fixing this has become a full time job!
Bob W'''