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Description of problem:

I am not sure whether this is the right component for this problem..
Firefox should not be the default application to be associated with XML files. Firefox is consuming too much memory which may "freeze" the system as described in bz608691.
Rather gedit should be used insted.

Version-Release number of selected component (if applicable):
shared-mime-info-0.70-2.el6

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Then firefox should stop advertising that it can open XML files.

This issue has been proposed when we are only considering blocker
issues in the current Red Hat Enterprise Linux release. It has
been denied for the current Red Hat Enterprise Linux release.

** If you would still like this issue considered for the current
release, ask your support representative to file as a blocker on
your behalf. Otherwise ask that it be considered for the next
Red Hat Enterprise Linux release. **