That is not correct content for application.ini.

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 skip the step to create a new profile, that is not necessary for this issue.

See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

Hi Guys I have SOLUTION for that. I perhaps could not attach my file here but let me still tell you the solution. You need "Application.ini" file from any other pc having Mozilla over it. There is no complex information in this file although. I will past code of that file here so you could copy that to your file as it is. After doing this if you get any different error prompting for version error then open this "Application.ini" file again where you just copied code. and change the version (you will find version text on second line at end) to appropriate one according to the Error Alert you just encountered before. That's it.

        Application.ini   File Code is below

(whole code must come in three lines, I can see line break special characters in special rectangular format)

***** BEGIN LICENSE BLOCK *****

Version: MPL 1.1/GPL 2.0/LGPL 2.1

The contents of this file are subject to the Mozilla Public License Version

1.1 (the "License"); you may not use this file except in compliance with

the License. You may obtain a copy of the License at

http://www.mozilla.org/MPL/

Software distributed under the License is distributed on an "AS IS" basis,

WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

for the specific language governing rights and limitations under the

License.

The Original Code is Mozilla Firefox.

The Initial Developer of the Original Code is

Benjamin Smedberg <benjamin@smedbergs.us>.

Portions created by the Initial Developer are Copyright (C) 2006

the Mozilla Foundation <http://www.mozilla.org/>. All Rights Reserved.

Contributor(s):

Alternatively, the contents of this file may be used under the terms of

either the GNU General Public License Version 2 or later (the "GPL"), or

the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

in which case the provisions of the GPL or the LGPL are applicable instead

of those above. If you wish to allow use of your version of this file only

under the terms of either the GPL or the LGPL, and not to allow others to

use your version of this file under the terms of the MPL, indicate your

decision by deleting the provisions above and replace them with the notice

and other provisions required by the GPL or the LGPL. If you do not delete

the provisions above, a recipient may use your version of this file under

the terms of any one of the MPL, the GPL or the LGPL.

***** END LICENSE BLOCK *****

[App] Vendor=Mozilla Name=Firefox Version=3.5.11 BuildID=20100701023340 SourceRepository=http://hg.mozilla.org/releases/mozilla-1.9.1 SourceStamp=56248d52ac25 Copyright=Copyright (c) 1998 - 2010 mozilla.org ID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}

[Gecko] MinVersion=1.9.1.12 MaxVersion=1.9.1.12

[XRE] EnableProfileMigrator=1 EnableExtensionManager=1

[Crash Reporter] Enabled=1 ServerURL=https://crash-reports.mozilla.com/submit