I can't open firefox after ATTEMPTING to update

I was prompted to do an automatic update or uversion update, not sure which. I did, as usual, and when I came back to the computer, it stated, as usual, that Firefox needed to restart, so I closed it, and it attempted to reopen the browswer. I could see part of my toolbars adn the words on my desktop background, but no actual browser window, with the yahoo screen or toolbar tabs, etc. I could blindly click, and assume I hit a button that said "Close" or "OK". I think it was telling me the software update failed. It closes, tries to open up again, I see the "well, this is embarassing," but still no browser screen. It repeatedly does this close/open until I just close it, because the actual window never opens. I started using IE and attempted to update firefox version from the mozilla website, but it won't happen. I followed forum topics related to the above issues, but they require making changes through the Firefox window, which now (the next day) will not open at all. I want to uninstall and reinstall, but I don't want to lose my bookmark profile in Firefox. I also attempted two failed tries at connecting to a livechat, which got me down to #1 then informed me it was unable to connect. Lastly, even using my IE window, when viewing forum topics, lines overlap and make it hard to read the postings. This is somewhat similar to the words showng up on m background all jumbled, but not in an actual browser window.

Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
You can initially skip the step to create a new profile, that may not necessary for this issue.
See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall
http://kb.mozillazine.org/Profile_backup and [[Backing up your information]]

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