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Firefox giving XML parse errors all of a sudden; fails to start

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Starting Firefox on Centos 5.5 (i386) fails, with error popup: XML Parsing error: error in processing external entity reference Location: chome://browser/content/browser.xul Line number 15, column 1

Starting Firefox on Centos 5.5 (i386) fails, with error popup: XML Parsing error: error in processing external entity reference Location: chome://browser/content/browser.xul Line number 15, column 1

Additional System Details

Installed Plug-ins

  • -Enables remote interaction with virtual machines.
  • The default plugin handles plugin data for mimetypes and extensions that are not specified and facilitates downloading of new plugins.
  • The Adobe Reader plugin is used to enable viewing of PDF and FDF files from within the browser.
  • The next generation Java plug-in for Mozilla browsers.

Application

  • User Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-GB; rv:1.9.2.4) Gecko/20100611 Firefox/3.6.4

More Information

Firefox does not start at all

DaveRo 18 solutions 175 answers

This may be a problem with an add-on.

Try Troubleshoot Firefox issues using Safe Mode

If the problem disappears it's an add-on - try disabling them to see which it is.

This may be a problem with an add-on. Try [[Safe Mode]] If the problem disappears it's an add-on - try disabling them to see which it is.

Question owner

Safe mode does not fix the issue, nor does uninstalling firefox, removing all traces from the system and reinstalling.

Version installed from CentOS repositories:3.6.4-8.el5.centos

Safe mode does not fix the issue, nor does uninstalling firefox, removing all traces from the system and reinstalling. Version installed from CentOS repositories:3.6.4-8.el5.centos
DaveRo 18 solutions 175 answers

I don't know what this is. I would suggest a lot of googling and asking on Centos forums.

Have you tried setting up a new profile - see Troubleshoot and diagnose Firefox problems

Does it happen whenever you start up? Was this an upgrade from a previous version? If so I wonder if there's a dependency problem in the Centos rpm - perhaps a mismatch with xulrunner. You could try reinstalling xulrunner (or updating it if there's a later version). I had a similar problem with SUSE rpms recently.

Or you could try installing the Mozilla tgz for comparison. If you do that set up a new profile and keep the two versions separate (or uninstall the Centos one)

That's all I can think of for now.

I don't know what this is. I would suggest a lot of googling and asking on Centos forums. Have you tried setting up a new profile - see [[Basic Troubleshooting]] Does it happen ''whenever'' you start up? Was this an upgrade from a previous version? If so I wonder if there's a dependency problem in the Centos rpm - perhaps a mismatch with xulrunner. You could try reinstalling xulrunner (or updating it if there's a later version). I had a similar problem with SUSE rpms recently. Or you could try installing the Mozilla tgz for comparison. If you do that set up a new profile and keep the two versions separate (or uninstall the Centos one) That's all I can think of for now.
speleo01 0 solutions 1 answers

I recently had this problem and noticed that the "Work Offline" option had somehow been checked (in the drop-down menu when Firefox is clicked in the uppermost left corner of the page)...I unchecked that and the errors disappeared.

I recently had this problem and noticed that the "Work Offline" option had somehow been checked (in the drop-down menu when Firefox is clicked in the uppermost left corner of the page)...I unchecked that and the errors disappeared.