My Firefox browser will open just fine, but the page is completely blank when it pulls up. Please help!

My laptop got infected with some kind of a trojan. I ran a full scan using my virus protection software, and after quite a bit of work (including a system restore), the infection seems to have been cleaned up and removed.
The problem I'm having now, is when I open my Firefox web browser page, it pulls up, but the page is completely blank. There is literally nothing in the page, no tabs, no home page, nothing. So, I cannot access the internet right now using Mozilla Firefox. I'm having to send this out via IE, which I do not like to use anymore. I was not having any issues with my Firefox web browser, until my pc got infected. Please help!

It is best to do a clean reinstall after doing a system restore in case some files got mixed up.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 4.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded 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.
Your bookmarks and other profile data are stored elsewhere in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder] and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.
Also remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
* https://support.mozilla.com/kb/Server+not+found
* https://support.mozilla.com/kb/Firewalls

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