Once in a while Eclipse crashes. And refuses to startup afterwards.
There are many info on the net the doesn’t always help.
Here are the steps that i try for fixing this Eclipse/xulrunner related/XPCOM error.
In no particular order.
$ gedit /.eclipse/org.eclipse.platform_3.5.0_155965261/configuration/.settings/org.eclipse.ui.ide.prefs
$ eclipse -clean
$ rm -rf /workspace/.metadata