To be able to display headers information in the PageInfo tab of
Mozilla or Firebird the nsHeaderInfo component must be registered.
This component should be found in the file Mozilla/Components/nsHeaderInfo.js.
Registration should have been done by the LiveHTTPHeaders installation.
However this sometimes does not work.
Follow these steps to enable Mozilla or Firebird to find and register the
component:
- Delete the file
Mozilla/Components/compreg.dat
- Delete the file
Mozilla/Components/xpti.dat
These two files should be recreated automatically by Mozilla or Firebird
when it is next started.