Continiously receive this in my Firefox Error Console

[B. MacDonald]

Binary package hint: firefox-3.0

Running Ubuntu 8.04.2 Kernel Linux 2.6.24-23-generic (i686)
Firefox 3.0.5
Have No Script, Fasterfox, Adblocker and numerous other addons installed in Firefox.

Continuously receiving this error in my Firefox Error Console:
Error: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIFileOutputStream.init]
Source file: file:///usr/lib/firefox-3.0.5/components/nsSessionStore.js
Line: 2165

This problem appears to have started recently, as my browsing speed changed. The Error Console was packed prior to my clearing it. I've noted the line (defined as the problem in the console) below to the right side with "!!!!".
Thank You ahead for any assistance, as I'm really tired of clearing my error console. Should you require any additional info, please notify.

I've also started receiving numerous warnings and more errors. Most of which are being generated from within my file system. Some have come from external domains, I'm using the manage domain blocker to keep them from constantly reoccurring. I copied the file "nsSessionStore.js" and save it to a different directory, then deleted it from the components. This stopped the 0x80070057 error and the file still resides on my system just not in that location. This did not stop the ongoing additional errors and warnings.
Your help would greatly be appreciated. If I uninstall Firefox and switch to Opera will this problem follow? Thanks again for your support.

Error: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIFileOutputStream.init]
Source file: file:///usr/lib/firefox-3.0.5/components/nsSessionStore.js
Line: 2165

/* ........ Storage API .............. */

  /**
   * write file to disk
   * @param aFile
   * nsIFile
   * @param aData
   * String data
   */
  _writeFile: function sss_writeFile(aFile, aData) {
    // init stream
    var stream = Cc["@mozilla.org/network/safe-file-output-stream;1"].
                 createInstance(Ci.nsIFileOutputStream);
    stream.init(aFile, 0x02 | 0x08 | 0x20, 0600, 0); !!!!This is the line it references to!!!!!

    // convert to UTF-8
    var converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
                    createInstance(Ci.nsIScriptableUnicodeConverter);
    converter.charset = "UTF-8";
    var convertedData = converter.ConvertFromUnicode(aData);
    convertedData += converter.Finish();

    // write and close stream
    stream.write(convertedData, convertedData.length);
    if (stream instanceof Ci.nsISafeOutputStream) {
      stream.finish();
    } else {
      stream.close();
    }
  }
};

function NSGetModule(aComMgr, aFileSpec)
  XPCOMUtils.generateModule([SessionStoreService]);

ProblemType: Bug
Architecture: i386
Date: Wed Feb 4 02:53:43 2009
DistroRelease: Ubuntu 8.04
NonfreeKernelModules: nvidia
Package: firefox-3.0 3.0.5+nobinonly-0ubuntu0.8.04.1
PackageArchitecture: i386
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.24-23-generic i686

[Jojoe (nexusfr)]

Error: aTab.__SS_extdata is undefined

Source File: file:///usr/lib/firefox-3.0.10/components/nsSessionStore.js

Line: 837

[madbiologist (me-again)]

Official support for Ubuntu 8.04 "Hardy Heron" has ended. If this is still occurring on Ubuntu 12.10 "Quantal Quetzal" please file a new bug report.